There were some of those blocks that cracked in the main webbing.
YES, That is no problem, it will bolt right up.
Chevrolet passenger cars in 1973. 454 with 250 Horse Power and Turbo 400 transmission. 2 and 4 bolt mains were possible.
This casting code is from both two and three freeze-plug small-block 400's from '1970 to 1973. These blocks can also have 2 or 4 bolt mains
Torque specs for 71-73 Pontiac 400 main cap bolts 100 ft-lbs, rear mains 120 ft-lbs. Rod bolt specs 43 ft-lbs respectively.
Yes, It will bolt right up to it with no problems.
In relation to a/c mains electricity, or to audio frequencies, 400 kHz is very high. In relation to radio waves it is fairly low.
No...it will have the bolt pattern of the Pontiac, Cadillac, Olds and Buick. Chevy has a different bolt pattern. There are some transmissions that do have the dual bolt pattern, but I don't think the TH 400 was one of them.
yes.
Yes, they have the same bolt pattern.
It will if the trans has Chevy bolt pattern.
350 heads will bolt to the 400 block. They will need to be drilled for the "steam ports" in the 400 block.
YES.