.47/500
.400
400 square inches
A softball player is supposed to throw 400 balls a day but if your throwing with a partner than its 800 because than you and your partner each throw 400 balls.
compression
acording to an s.a. book the horsepower of the 1971 400m is 260 @ 4400rpm. the torque is 400 pound feet @ 2200rpm. the compression ratio is higher on the 1971 400's than any of the other year models. after 1971, all 400 and 351m's had a compressoin ratio of 8.4:1. the compression ratio of the 1971 400 was 9.0:1. acording to an s.a. book the horsepower of the 1971 400m is 260 @ 4400rpm. the torque is 400 pound feet @ 2200rpm. the compression ratio is higher on the 1971 400's than any of the other year models. after 1971, all 400 and 351m's had a compressoin ratio of 8.4:1 or either 8.0:1. the compression ratio of the 1971 400 was 9.0:1.
Good compression, good heads, good cam.
It is a hi-compression motor and does require 93 octane.
400 quarts is a better estimate.
Everything will mount to the 455 motor.....matter infact, if you use the 400 heads, you will gain some compression in comparison to a like 455 head (ie.. 400 vs 455 6x heads). can I have your old 400 motor? Yes everthing will fit. However, if you are going to drive it on the street you do not want higher compression, the stock compression on most 1970 Pontiac 455s is about 10.25-1 (already too high for 93 octane pump gas). Changing to a 1970 400 head (around 72cc combustion chambers) will put your compression up to about 12.5-1 and require at least 105 octane fuel. If this is for the strip only, or you have a source of affordable race gas then yes higher compression will increase horsepower and torque. On pump gas shoot for about 9.5-1 compression max with iron heads. A great head for a pump gas 455 is the 1971 400 head casting number 96 it has 2.11/1.77 valves and 96cc chambers and will make about 9.5-1 with a stock 455 short block.
Mind 95 guess ring time .been setting up could it be stuck
The heater core itself, should be under $50. Installation aprox $300 to $400.
it was about £300 for the core and about £400 for 20 gb hd in 2001