A833 NP A body trans ID help & intro.

Well I wont feel it for long. I will be pulling the 318 & 3 speed trans and preserving it, as the Twister is all original, interior and Paint. In a couple months I'll be looking for a 360 71'-72' with the thicker cylinder walls. Will either build it strong or go with a 408 stroker kit. Gonna have me some fun!
The 3spd and 4spd OD have the same first gear.
Thick wall engines are generally a myth.
Sonic check!
I had an early 340 tank with only a .030 over bore. Some cylinder walls were under .050.
Sonic check any block you get.