Whats your transmission suggestions?
The 4 Speed 833OD came in mid late 70's - early 80's MOPAR trucks and vans and have aluminum casings. Here's a post with a similar theme:
http://www.moparchat.com/forums/showthread.php?t=113296
The 200R4:
http://www.nastyz28.com/chevy-transmission-identification.php
" My favorite candidates for a donor
THM200-4R trans to fit a
Chevy pattern are as follows;
81~90 Olds - Full Size, 88 & 98
models
83~87 Olds - Cutlass
85~87 Olds - 442 models
84~87
Pontiac - Grand Prix
84~87
Chevrolet - Malibu
84~86 Chevrolet - Monte Carlo
85~90 Chevrolet - Impala
Hope this helps;
John. "
The Guys in the know say try to find a 85+ as they have a few upgraded parts.
Good Luck, Keep us informed on that 4th tire churp. :burnout: