I friend of mine put a Pontiac 428 in a 51 3100. They came with 10.75 to 1 compression.
He said that when he launched it from a dead stop, he could see the side of the bed rise considerably in the rear view mirror.
Interestingly, he retained the torque tube rear end, using a Buick bell housing which had the correct bolt pattern for the Pontiac at one end, and the correct bolt pattern for the stock 3 speed on the other end.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission