i have a 91 d150 with a 318 and looking to changing the heads. how much of a differ. would the 360 heads be from the 318? and what it give me more power?

 

They're the same engine (LA series), I don't believe the heads are different, just the stroke.

 

I could be wrong but I believe the combustion chambers are larger on the 360 heads and that would lower your compression ratio and you would lose power.

 

The Captain is correct. For the LA engines, there are several different heads. The 318's have smaller chambers and yeah, you'll be losing compression and power. I don't have time right now, but you should look into getting some Magnum heads since they flow a lot better. Or try to find LA 318 heads from the mid/late 80s, they've got swirl ports and other things to help .

 

i wanna find out how to get more power and hp outta my truck with out doing any thing major any ideas? its an '89 dodge ram 1500 318

 

look for the whole upper motor that has 308 casting heads. These are a improved flow high swirl head. magnum heads would be better but carburating it is a pain and I am not sure of the compatibility of the magnum injection system on your truck.

 

The magnum heads don't have fuel injector bosses, those are in the intake manifold. Swapping in some Magnum HD heads would allow for way more airflow, and they're relatively inexpensive. You'd have to re-drill the mounting holes to adapt the intake manifold to the heads, but there are people out there who can tell you more about that.

 

what about 318 heads on a 360?

 

you know as far as carburated heads go....if it is a factory 4bbl they are 360 heads. I would not redrill magnum heads for the factory intake edlebrock makes a intake for magnum heads but its for a carb. http://www.allpar.com/mopar/4bbl.htmlhas a couple of articles on modifing a 318 and head info. I started here when I upgraded my satellite motor.

 

that site is lot of help, thanks