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My 77 302 heads did not have them. Does that mean anything?

is that good?

Hey I was porting out the exhaust side on my DOOE-c heads and I noticed the intake has 2 springs on it. One big normal one and a flat kinda skinny one inside it. Is that good or bad? and what...

whats so good about 3/8 studs other than they are bigger? And do roller rockers alone do anything at all? like how much hp on a bone stock motor. JW cause my friend got some from a swap meet...

well would it be worth doing it if i had a rv cam long tube hedders 670 street avenger electric fan "i dunno if that really does anything" and if im donna do it do i have to take out the valves?

that hump is on the top of the chamber? How much power will it rob?

Huh got the heads today. They have DOOE cast into them. and the valves are 1.84 1.54 so this must mean the combustion chamber is 60.9?

Anyways one of the heads had C90Z-6049 ARS ...

I looked for gt40p heads called every wrecker in manitoba. Asked ford they want about as much as aluminum heads from any other place. I also asked them if they had any D00E heads nothing anywhere....

I got a 670 street avenger rv cam. Long tube hedders. Built c4. 4:11's Preformer intake. I was doin a budget buildup. I thought i was getting d00e heads. I dunno what to do to these...

humm those heads sound like a waste of money. I had good heads on my car. I dunno what to do.

so you dont know anything about valve size and combustion chamber? Should i get these shaved down a little. I was looking for something that had 184 154 valves and 60.9 cc combustion chambers. ...

i wanted to know valve
size combustion chamber size

I have a set of what i think is 1975 351w heads. The numbers I found are D5AZ - 6049 - B3 4E13 9902-6049. I have looked arround on the net for about a hour or so and can...