Overdrive Options

Sorry, but I think you're shootin so far in the dark I think your blind. Not trying to be mean but other then the cost of an adaptor (which if you think about it seriously for a moment) the amount of work needed, time materials skill (getting a shop to do it if you don't have the skill $$$$) that adaptor works out to be about the same cost of that labor. Now you can put a used tranny in a car but I'm not it gets rebuilt before it goes in my car (oh and it's cheaper to rebuild a 200r4 then the 42rh the whole GM over Mopar) Now you can buy a one from a performance shop or a trusted local or yourself save a little bit that way. that said youll put more power to the ground with the 200R4 and these things can be built to withstand more power then a 42rh, just pointing that out. Sorry man but GM beats Mopar in small overdrive tranny. Also if you'll willing to do that much cut and redo the tunnel, why limit yourself to a 4 speed auto when a little more you can get a 6 speed auto? It just doesn't make any sense to get less when you can get a double overdrive and better rear gears. Just Something to think about.

I've thought about it a lot actually, even if you weren't as gifted as myself to have a shop, You still have to fabricate a cross-member either way. The cost to cut out and weld in a 1/4 piece of steel for the torsion bar support is laughable. We're splitting hairs here. For me it costs $700 to put in a 42RH with a decent torque converter. I lost count what Mopar to ya spent on his 200r4. As far as putting more power to the ground with 200R4 vs 42RH I still don't see conclusive evidence of parasitic loss between the two. Still going 42RH. Not going to debate further until I see something concrete.