1slwstang

hey another newbie question but i am considering a 351. I am currently running a 302 w/ '66 289 heads....but what i am asking is will those heads pull enough air for that 351 w/ a decent cam in the range of about .550 lift and a intake like an edelbrock rpm air gap. thanks guys

BlessedHellride

you will have to machine/drill out the holes in the heads. Yours are more than likely 7/16ths and the bolts/studs needed for a 351w require 1/2"

dudeboy

NO



The engine will run, but no matter what other parts go on the engine, the heads will be the limiting factor.
Factory heads are barely adequate for a 302, let alone a 351w...

1slwstang

ok, so scratch that idea. So what are some other factory heads that are "ok" to run b/c i dont exactly have the funds to go all out, i am simply lookin for the extra cubes. Maybe some TQ and HP from the 351. Is running a dome piston a decent idea to get some compression out of those wimpy heads, a decent cam and intake maybe?

AdderMk2

extra cubes dont always equal extra power

toss some gt-40P's on your 302, along with a good cam choice and proper intake... and you have a 300hp motor all day long

1slwstang

ite, thanks for the info and i might just do so. i usually hit the local pull-a-part every so often just to see what they have

AdderMk2

btw.... by "good cam" i was implying that you throw that F cam in the garbage

1slwstang

well im open to all options so what's to consider when buyin a cam with the intake and the 289 heads i have and/or the gt40p's and what cams should i be looking at? b/c i honestly dont no what to really look for...

AdderMk2

dont use the 289 heads... sell them

dudeboy

This is my opinion based on my own experiences...

You already have 289 heads, and aftermarket heads aren't in the budget. A 351w can quickly outgrow gt40's....

If it were me, I would bolt on the 289 heads and run them. I wouldn't spend any money on heads that would still hold the 351w back, even if they were better than the 289 heads. I would save that money for a good aftermarket aluminum head.


Again, just my opinion...