I recommend you look for a '54-'55 235 or 261 engine, a late '50s-'60s SM 319 three speed overdrive and a '55 first series rear end assembly, including springs.

I have that tranny and rear end in my '54 burb behind the stock 248 and I cruise 70-75 at around 2000 rpm.

I also have the stock front axle with power discs. It stops as well as it goes.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.