Krueggs81

What would it all day to put a set of valve from a 360 head into a 318 head? Or will they just slide right in? Or what do you gotta do?

Matt

68plymouth383

Why not just swap out the whole head?? The 318 340 360 la engine heads interchange.

Krueggs81

Because the chamber is bigger on a 360 head and you lose compression. Been reading alot on this on a bunch of different sites and forums of how the compression drops so low..

Skwerly

Yeah, so you just shave it thirty thousandths and go for it.

Gorts 5th

depending on the year the compression drops more or less
i run 360 heads on my 318... stock valve sizes but ported to the max
i basically traded velocity for volumetric efficiency it works.
i notice a gain in upper end performance where the 318 heads fell off.
say around 4000-6500-7000.
then later i had the heads milled, made it better.
i would swap the heads in a heart beat, mill em like Skwerly recommends.

Chryco Psycho

you can open up the seats , I would install hard seats on the exhaust side & put in the larger valves , I would also use a 302 casting 87-92 to do this

Gorts 5th

Not knocking the 302s i read 318 builds with this head ported and valves maxed out producing 400 hp that's serious power, i have a set of 302's i might port polish and max the valves... i'm curious.