[03stanger]

will a set of 351 heads with bigger valves fit and work on a 302 block bored 30 over and "f" cam with holley intake and holley carb

[03svtsnakevert]

Originally Posted by 03stanger will a set of 351 heads with bigger valves fit and work on a 302 block bored 30 over and "f" cam with holley intake and holley carb

yes, as long as they are not cleveland heads...make sure you get a 351 intake as well

[mdvaldosta]

No you don't use a 351w intake. The 351w heads are the same as 289 / 302 heads. Running an F cam and with larger valves, you should definately check for piston to valve clearance. Not sure if you'd have problems or not, though it'd be close either way.

[03svtsnakevert]

Originally Posted by mdvaldosta No you don't use a 351w intake. The 351w heads are the same as 289 / 302 heads. Running an F cam and with larger valves, you should definately check for piston to valve clearance. Not sure if you'd have problems or not, though it'd be close either way.

that is correct they are the same...I was thinking of using a 351W block...if you use a 351W block then a 289-302 intake will not work...my bad

[03stanger]

thanks.....i know not to use 351c heads as the 351c is a big block..thanks for the help fellas

[03svtsnakevert]

Originally Posted by 03stanger thanks.....i know not to use 351c heads as the 351c is a big block..thanks for the help fellas

The 351c is not considered a big block

[1slo5.0]

Originally Posted by 03stanger will a set of 351 heads with bigger valves fit and work on a 302 block bored 30 over and "f" cam with holley intake and holley carb

Yes they will fit but you will need a bushing to reduce the head bolt size from 1/2" to 7/16". What year are the heads? If they are not 69 351W heads you are wasting your time because a 5 liter (E7) head will out flow it. Your best bet would be to get a set of GT40P heads of a 97 1/2" or newer Explorer.

[1slo5.0]

Originally Posted by 03stanger thanks.....i know not to use 351c heads as the 351c is a big block..thanks for the help fellas

A 351C is a small block and yes the heads will work on a 302 block but you will need pistons specific to the Cleveland head (Boss 302 pistons) and an intake designed to fit those heads (Boss 302).

[03stanger]

im not sure of the year of the heads..its for a friend of mine...but much good info..ill pass it along thanks......hes not looking for much more than stock replacement..he cant afford much and he came across the 351 heads...thanks

[03svtsnakevert]

Originally Posted by 03stanger im not sure of the year of the heads..its for a friend of mine...but much good info..ill pass it along thanks......hes not looking for much more than stock replacement..he cant afford much and he came across the 351 heads...thanks

you can look at the casting number on the heads...particularly the first two characters...

for example:

C6=1966
D3=1973

and so forth

[88LSC]

more important is the casting date which will be something like this 8B16 and usually has circles on both sides that look like screws. just an example from my D4AE 351w block.

8 = year
B = month
16 = day

02/16/1978