I'd have to know if the 3800 had any goofy external balancer issues like some small blocks, and for sure the 2.8/3.1 flywheels/bellhousing bolt up? Sweet!
I know for my car there are many different axle combos depending on if it's m/t or a/t, 4 cyl or 6 cyl, etc. I don't know about the GM line but perhaps they are better about interchangeability on that than Ford.
Trans mount fab is no biggie for some of us but then it is a biggie for some of us. Same with the clutch pedal/linkage.
Can the 2.8/3.1 stuff handle full torque? Wouldn't want to floor it and scatter parts all over the road. Don't floor it? Well then don't fool around with the 3800 either and put the whole 2.8/3.1 mess in there. Haven't compared hp/tq ratings either though. Edit: '89 3800: 165HP, 220ft/lb; H.O. 2.8 140HP, 160ft/lb.; some 3.1s put out more than the 3800 so depending on the trans model life is likely a non-issue.
I've never reflashed an ECU. Something tells me I'd need more than jumper cables to do it.
So how does a 3800 5 sp m/t FWD '59 Bel Air sound? Might even be able to touch 30 mpg with it.
