Hey all, been on and off the forums for years. I've now acquired a total of 3 620's and finally have one that I'm actually planning to build. Picked it up several months back and parked it in the corner of the shop. Ordered my first batch of parts for it last week and just finally decided to see if I could make her go. Supposedly was in storage for at least 10 years before I picked it up (out of the storage unit). Has a Detroit locker in the rear, a completely rust free body (literally have not found ANY), L20b with a cam (supposedly) and Mikuni 44's.
First batch of parts was a little random, but I picked up front and rear window seals, full engine gasket set, spark plugs, timing set, brake master cylinder, clutch master cylinder and slave cylinder.
I was told that it had a blown head gasket when I bought it, but thought the first thing i'd do is see if I could get it fired up and test that out for myself. Did a quick swap of the fluids, ran a dedicated fuel line to a gas can with new fuel, threw the new plugs in it and started cranking. To my surprise, it took off pretty quick, but idled quite rough. Give it some throttle and it smooths out and actually revs quite well. Started pulling plugs one at a time to determine the cylinders that were not firing. I found that I could removed both plug wires for cylinders 1 & 2 and have no change in engine operation... bummer, blown gasket between one and two?! Removed plugs and performed compression test on both cylinders... 175psi in #1 and about 160 in #2... huh, well maybe they have the firing order off? verified that it was correct at 1324. Verified that the front carb is fueling (it is).
This is where I currently sit. I am kind of thinking that the front carb is actually over fueling to the point that I have a dead miss on those cylinders? On that topic, I'm sure that these carbs could use a solid rebuild. I don't know anything about them... what is the best option for having them rebuilt?
Pics below of what I'm working with! Looking forward to the build with you guys