I have a set of 351 w heads that look like they can bolt up to my 302 block, i also have a friend w/ a gt40 intake... could this combo work out for me? need advice im planning on doing this soon
Im in the process of building a 351w...The heads you have should have larger intake ports and breathe a little better than the stock 5.0 heads. The down fall is that the bolt holes on the 351w heads are 1/2 and the 302 are 7/16. it can be done, but be careful.
Also, according to one of my books, the intake port is .25" wider, so you should pull more air. The compression chamber is about the same, so no loss in compression ratio should take place.
They make stepped washers to bush those holes down to 302 bolt size. You might also want to check those seats out measure pushrod also. I think those are the old rail rocker heads they may need a longer pushrod?
A set of e7 heads with a home port job will flow as much or more and make more power under the curve. If you could find gt-40 or gt-40p heads you would be way ahead of the curve here. The technology today is a bit better than it was 39 years ago.
odd thing i noticed today, one of the valves looked as if they were pushed in further then the others... is this normal? all of the other valves looked fine but one was pushed in
Check to see if the 351W heads are from the '69-'70 model years. If they're not, don't use them. Those two years had the best heads and if you had a ported/polished set, you could achieve 300 rwhp. All of the 351W heads in the '71-up family were smog versions and in the '80's, Ford began using the 302 heads on those motors.
The heads are deffinetly 69 351w heads.. But like i was saying, im not sure if i should use them because the #1 cylinder valve is pushed INTO the head and is not flush or lipped like the rest