smokehouse_83 Posted April 15, 2016 Report Share Posted April 15, 2016 Do any of the control arms off the Datsun cars bolt onto the 620? I though I remember reading they do. 240-280z/280zx/300z/240sx. I don't mind building upper strut mounts or fabing up a steering rack. 1 Quote Link to comment
datzenmike Posted April 15, 2016 Report Share Posted April 15, 2016 The '78/'79 LCAs are the same. The '80-'82 from the 720 are different numbers but look the same and may work. MAY work. Otherwise no car or truck LCAs before '78 will fit. The truck uses torsion bar suspension and not struts. Apples and oranges. Why would you want to exchange the LCAs anyway? 1 Quote Link to comment
]2eDeYe Posted April 15, 2016 Report Share Posted April 15, 2016 620 control arms are all that will 'bolt' in The trucks are a totally different design than the cars. 280 style 620 style The closest would be 521 control arms, but they have a different torsion bar connection. There is probably differences in the sway bar attachment and other features as well. 1 Quote Link to comment
red13 Posted April 16, 2016 Report Share Posted April 16, 2016 the kinkpin and ball joint lowers are different as well 2 Quote Link to comment
datzenmike Posted April 16, 2016 Report Share Posted April 16, 2016 Yes, only the '78 and '79 will fit. 1 Quote Link to comment
smokehouse_83 Posted April 16, 2016 Author Report Share Posted April 16, 2016 I have a 79 so its ball joint. I was thinking if the 280z control arms would bolt up I could have better brake and rim options as well as be able to use a rack. I could fab up some strut mounts and get rid of the upper control arms. The torsions are already gone and I am looking for options for front suspension. 1 Quote Link to comment
datzenmike Posted April 16, 2016 Report Share Posted April 16, 2016 The 620 has a frame and all the suspension is bolted to it including the body on rubber mounts. A strut would not be supported properly at the top by the body sheet metal and a good bump would pull the body off the frame. If you want a brake up grade go to the search function upper right and type in " late 720 or D-21 Hardbody spindle swap into 620". Torsion bars are gone? gone where? Why would you remove them? without researching this first? Would you jump from a plane and then look for a parachute? 1 Quote Link to comment
2wheel-lee Posted April 16, 2016 Report Share Posted April 16, 2016 I have a 79 so its ball joint. I was thinking if the 280z control arms would bolt up I could have better brake and rim options as well as be able to use a rack. I could fab up some strut mounts and get rid of the upper control arms. The torsions are already gone and I am looking for options for front suspension. If you can fab the strut mounts, it shouldn't matter what lower control arm fits, because you should be able to fab new mounts for any control arm - that's far easier than fabbricating strut mounts. 1 Quote Link to comment
datzenmike Posted April 16, 2016 Report Share Posted April 16, 2016 It's easier to leave them alone and add brakes. The late 720/Hardbody spindle bolts onto the 620 disc brake truck. It has a huge caliper and vented rotor. The VG30 powered 4x4 Hardbody brakes are even bigger. 1 Quote Link to comment
Lockleaf Posted April 16, 2016 Report Share Posted April 16, 2016 And late 90s pathfinder brakes are even bigger. They bolt up to a 720 spindle with a minimum of modification. 2 Quote Link to comment
datzenmike Posted April 17, 2016 Report Share Posted April 17, 2016 Rim option? It's a truck! Chev, Ford, Mazda, Isuzu, Currier, Toyota, Escalade,720/D21/Xterra/ Frontier (definitely many more) 14/1516 and up 6 bolt truck rims all fit. Some may need mods. 2 Quote Link to comment
smokehouse_83 Posted April 17, 2016 Author Report Share Posted April 17, 2016 Rim choices for drag racing, pretty limited when it comes to large spaced wheels studs. I have thought about fabricating A arms and using mustang knuckles and struts since I have a mustang sitting here that I took the engine out of for the truck, gives you alot of option for drag oriented shocks and wheels. I think i want to leave it as close to bolt on as possible for class racing though. So maybe just modifiy the stock upper control arms so a coilover will fit through them, seems tight though. 1 Quote Link to comment
datzenmike Posted April 17, 2016 Report Share Posted April 17, 2016 Drag race? Unless SR20DET there isn't enough power to need them. Just change the rears by drilling the axles and drums to 5 bolt. 1 Quote Link to comment
smokehouse_83 Posted April 18, 2016 Author Report Share Posted April 18, 2016 Its getting a small block Ford and a 70mm turbo, should be around 500-600hp. I was gonna stick a vh45 that I have into it, but it looks like a bad fit for the truck. So the VH is going in my 280z in the fall and the 5.0 is going into the 620 now. Gonna build a little drag truck with some 8.5/235 tires. Thinkin about GSXR carbs for the vh45. The L motor out of the truck came out and went into my baja bug. 1 Quote Link to comment
NoMoneyZ Posted April 18, 2016 Report Share Posted April 18, 2016 You're going to need to do a lot more work to the truck to hold that kind of power and I think brakes are pretty far off at this point. Hope you have deep pockets. Curious about how you put the L engine into your bug also, do you have pics of that? Sounds interesting. 1 Quote Link to comment
smokehouse_83 Posted April 18, 2016 Author Report Share Posted April 18, 2016 I used a Kennedy adapter to mount the L16 up to the bus trans in my bug. I thought the L16 with a ported L20 head/ cam/ header would make more power though. Thing is gutless, but I had an adapter welded to the intake and have a motorcraft 2150 carb on it so I will probably throw a turbo on it at some point since the carbs are great for blowthrough. If you PM me your phone number I will text ya some pics. With the truck I am trying to get the front end/brakes figured out to hold the power. Rear is gonna be a disc braked Explorer 8.8/caltracks though so I think with either 720 or 300zx calipers it should be ok. My real issue is I need coilovers in the front that are atleast single adjustable. I could buy the Beebani uppers and coilover kit and do that style coilovers, but them bitches are 400 buck$$$. What if I stuck the coilover on the upper a arm like a early mustang? I probably should do a s10 or ranger, but I have a 620 and I think they are the best lookin mini truck out there and it will be very unique. 1 Quote Link to comment
datzenmike Posted April 19, 2016 Report Share Posted April 19, 2016 An L16 with a larger chamber L20B head drops the compression from 8.58 down to 7.72 1 Quote Link to comment
smokehouse_83 Posted April 19, 2016 Author Report Share Posted April 19, 2016 ready for lots of boost on pump gas then LOL. 1 Quote Link to comment
red13 Posted April 19, 2016 Report Share Posted April 19, 2016 Get some l24 flattops that increase your compression 1 Quote Link to comment
datzenmike Posted April 19, 2016 Report Share Posted April 19, 2016 ready for lots of boost on pump gas then LOL. The trouble with that is it runs like a 7.72 engine unless boosting. Cheaper to find an L20B for an extra 20 hp. 1 Quote Link to comment
smokehouse_83 Posted April 19, 2016 Author Report Share Posted April 19, 2016 The kit I bought has the 5 bolt l16 flywheel though. I would have to buy another flywheel and a motor. Would be alot cheaper to build a turbo system with a small instant response turbo and it would add alot more then 20hp. 1 Quote Link to comment
datzenmike Posted April 22, 2016 Report Share Posted April 22, 2016 What head is on your L16? It's cast low on the passenger side just above the block behind/ below #1 plug. If L20B it will likely be a U67.. could be a W58 1 Quote Link to comment
orangie Posted April 22, 2016 Report Share Posted April 22, 2016 Why not just graft a front frame or sub frame from another car? The only problem is the truck is really narrow so finding something with a wheel width that narrow is tough. If you have deep enough pockets one of the drag race shops can fab one up where the coils mount to part of the frame. 1 Quote Link to comment
smokehouse_83 Posted April 25, 2016 Author Report Share Posted April 25, 2016 Wow. I tried to drop the 5.0 in there and it ain't fitting without cutting out the firewall and I don't want to do that. Changed up plans and ordered a Laine kit to put the 5.0/t5 in my 280z. Gonna sell the vh45 and probably put a stroker 2.3 ford in the 620 when I'm done with the 280. Quote Link to comment
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