I do interstate driving over 4500 rpm and do not want any kind of exhaust drone - seems like I have an OE muffler on mine an it gives off only the faintest hum at that speed.
Even sticking with OEM style mufflers is not a guarantee. For instance, the Suzuki Swift variants Walker SoundFX is terrible - very noisy mufflers. Only the Walker stainless steel mufflers are quiet.
I was looking at Ranger and S10 exhaust parts and it looks like both are RHS systems (620 is LHS.)
The 720 might be good for the muffler/tailpipe? Bosal has a welded 283-903 for about $110 shipped from RA. (muffler has a front flange, but that could be cut off or welded.
I don't want to go to a muffler shop and get something bent because I would be really
pissed for a $300 job for muffler/tailpipe that was loud - which is what most people want.
I could weld up a tailpipe but that leaves the muffler.
So that leaves me sourcing a muffler.
I looked at a lot of threads and one referenced a quiet muffler choice for a King Cab. It didn't have much in the way of responses.
NOTE on PIPE SIZES: The S10 and Rangers use a 2.25 exhaust and 2.0 tailpipe for their 2.0 liter engines. I'm guessing they are 100 hp, so the 70 hp L18 could manage with a 2.0 and 1.75/1.50 pipe sizes.
EDIT: I'm guessing 520/521 exhaust might be a direct fit more or less. Yes, older, but past discoveries would apply.
NOTE: It doesn't seem like there is any attempts to find modern parts that will fit w/minor modification. Everyone is getting loud / performance stuff either DIY or from muffler shops.
I admit working on exhaust is a RPITA and virtually impossible if you don't have the tools/equipment. I have all the tools/welders but not the lift. I've done fabbed exhaust working off jack stands and I just don't have the stomach for it anymore. But it backed into a corner, I guess I'll have to submit...