Another choice could be a 2004R which was generally used beind
V-6's and is shorter than the 700R4/4L60. They used this trans in the Buick Grand National so they hold up ok.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine