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blocking off the heat cross over will make it very cold nature . i didnt do that as i was driving it yr round . what carb r i running . i had a non egr b/rb thermoquad , it flat flowed the gas , i thing a;ll other thermoquads r a egr carb it was a 1 yr only (72) in 73 they was all egr...

well i used tge same heads on a 73 400 in a polara but i used a 13.5 dc cam it hada 68 degree over lap it ran a 16.5 @ 115 in 2nd gear with 2.71 gear in thr rear , now some say thart no way a 400 would run thst hard i shifted @ 6000 rpm i ran 95+ lbs of oil pressure all i know it ran...

well it will help verses the 8-1 pistons & heads combo or u can go out & do s full rebuild &high lift cam . now a low compression motor is perfect for a turbo/supper charger too but u r talking lots more $$$$$$$$$ too these came from the old direction racing book (it was written by the same...

yes a lock up convertor will help some but just about all the ones u get now r junk (my trany guy tells me they disable all their lock up ones when they rebuild the trany's)

well all i told u i did on my 72 smog 440 i rebuilt it to 71 specs . i had a set of heads that was all ready milled 25 thousands i cc'ed the heads that was 90cc's (i was told with the block i had the heads would make it 9-1 compression motor i also added a windage tray &a double row timing...

WELL THEN PUT IN A OD TRANY . BIUT U WILL HAVE TO MODIFY THE TRANY TUNNEL CAUSE THE OD TRANY IS BIGGER . NOW I DONT KNOW THIS FOR A FACT but a guy i know (he runs a resteration yard . said yes to modifying the trany tunnel . now u could put in a 5 speed stick?

mill the heads at least 25 thousands put in a mopar pwrformance resteation cam / lifters & valve springs a 440 magnum/ six pack cam

if I was you I would replace both the water pump with a new one not a rebuilt & a double row steel timing set . dont do like I did ,wait till it threw the chain it bent every vaivue in the 440 but 3 I had to rebuild the entire motor also u may want to replace the fuel pump push rod they dont...