I listed 96 and 7K3 as my personal choices. If it were my engine I'd go with the 96s because they are documented as very good flowing heads. 7K3 also have large valve, but I am not sure if any emissions mods were done to them.

7K3 came on a 250 HP 400. 96 came on a 300 HP 400. Both are "net" numbers.

Either way, choose a fuel grade and adjust your build to suit.

6X and 96 have nearly identical flow specs and are considered performance heads. The 7K3 is somewhat less and not considered a performance head.

6X have the 1.66 exhaust valve, whereas the 96 have 1.77. Make a difference? Probably not one to be felt underfoot.

I've met a few very stout 455 with 7K3, they're a bit of a sleeper head. Of course, it doesn't take much to be better than the 7M3s the 72 455s had on them!

You stole my line Vikki.

i say buy a set of kaufmann racing heads or edelbrock heads and be done with it! with all the overtime your working willy, you should be able to buy it no problem!!!

those are red heads.those must be chebby heads

Red Pontiac heads...there must be some kind of discount

for 350.00 you could at least paint them the correct pontiac color jim.my el cheapo 7k3 heads at least have a nice paint job and they are the correct color...c'mon.

I thought those were the Harbor Freight big block Pontiac heads.

LOL They are red because they are a red hot giveaway. Like stated earlier, where would you ever find a fresh set of Pontiac performance heads for $350? HOT HOT HOT!!! LOL

payment sent 69 fbirdman sorry banshee but a set of heads that are needed nothing compared to a set of heads that need to be rebuilt for the same price.if you want to still sell pullys and bracketts im interested. im sorry you boxed the heads up but im willing to pay you for your time.