Everything I've heard, no they will not...
Yes
yes a 350 turbo converter will fit a 400 turbo and vice versa
The trans will bolt directly to the 350,but you will need a new torque converter. I had a Nova with the same set-up because the guy who had it before me blew the original trans and replaced it with a 700r4 from a Camaro. The Nova now has a 350 with that trans, but like I said new torque converter. you dont have to buy a new torque converter just use the straight six fly wheel on your v8
No. The spline pattern will not match.
Yes it will fit and it will work
No
No
I have a 350 turbo in mine Just about any transmission will work! Powerglide, Turbo 350 (lockup or non) or Turbo 400, even 700r4.
the transmission will bolt up to the block. trans mount in rear will most likely be different. shift linkage will sorta work. reason being is th350 has three forward gears and 700r4 has four forward gears. when i did the swap from th350 to 700r4 i made my own rear mount. instead of the stock shifting assembly i used a B&M megashifter for 700r4. make sure you use the torque converter for the 700r4. it should be noted that this is a common swap and many aftermarket companies offer shift linkage set ups or shifters for this application as well as mounts for the rear of the trans and any other adapting devices you might need.
yes but the 350 turbo like the 400 turbo are vacuum run so you will need to tie into a vacuum line i put a turbo hydromatic 400 in my 1990 silverado that originally had a 700r4 it sucks not having overdrive but it will work also the output shaft is bigger so i needed a compatible transfer case in a 2wd this may not be a problem
yes a turbo 350 would work just perfect with that 400 and a 700r4 will also but if being used mainly for racing it probably want hold together long .rieco.87