ZF 8HP70 8Speed Transmission on 74 Riviera 455ci

[Pouria]

Hi;
I am quite new to this forum and this is my very first post. I had been thinking about swapping that 3speed TH400 with a ZF 8HP70 8 speed transmission. I did a lot of reasearch in the web and could see that there are all the necessary adapters for this swap for SBC and BBC but nothing for BOP. Well, this is something I can handle with a Chevy => BOP adapter. Also, I could find the standalone control unit from a couple of sources. So, my final decision is to start this project ASAP. Now, I am in need of help from any of you buddies who might have done or seen this swap because I am living in Iran and having the parts purchased and shipped to me is kinda nightmare that I prefer not to experience twice.

Any opinions and helps are mostly appreciated in advance.

Pouria

 

[Bob]

I have never seen it done, but I live a sheltered life
A couple of things I would be concerned with is stacking the adapters may have cause a problem that will have to be addressed in the crankshaft to torque converter.
And because of your location, a readily proven conversion like a 700R4 might be a better choice and a smoother project.
Maybe someone else here has seen it done or is familiar with the 8 speed conversion.

Good luck, keep us posted!