I am looking at getting new heads for my truck and i was wondering what the best was. I found some with a 62cc chamber and a 179cc intake runner or there is one with a 58cc chamber and a 176cc intake runner. I have never messed wtih heads and dont know much about them. Hoping someone out there can help me out

 

How much do you wanna spend?

You can get stock replacements for under 200 bucks a head, but, in my view, that would be pointless.... as you are not solving any of the inherent problems with the stock heads.

You can get "better than stock" replacements for under 300 bucks a pop...... basically a "stock" head casting, with a thicker deck that is less prone to cracking. Everything else is basically the same.

You can go larger valve heads for under 500 each..... moves the power band of the motor up some, but, the kegger intake might compromise performance on those....

You can spend a grand per head too, for any of the above options. Just a matter of what you want to use your truck for, and your budget.

 

well what do those numbers mean tho? for the intake runner and chamber that is?

 

cc is the size of the combustion chamber area (in cubic centimeters).

The 62cc is the stock size. A smaller cc head will increase the compression ratio. A higher compression ratio increases power, but at the cost of also increasing the tendency to detonate (also called spark knock, or pinging). In some cases, a higher octane gas must be used to counteract the spark knock. A tuner can also be used to adjust engine parameters via the PCM to compensate.

I'll wager that the 58cc heads you are looking at are the Edelbrock Aluminum heads. Those heads have a smaller chamber because they are made of aluminum. Aluminum dissipates heat much faster than cast iron, heat dissipation also reduces spark knock. The heat dissipation properties allow those heads to function at a higher compression ratio and not suffer the ill effects of detonation. It's all win-win there.

Those edelbrock heads also flow much better than stock. Their probably the best bolt-on heads out of the box you can get for this engine for the money. Others do flow more, but require porting work to flow more or engine work to make them fit.

 

58/62CC is chamber volume. Stock size is nominally 60CC. So, the smaller chamber, on a stock bottom end, will bump compression ratio some. Larger chamber will reduce C/R.

176CC is intake runner volume. Larger runners flow more air, but, sacrifice velocity at lower RPM. Stock is 172, I think..... So going a bit larger here, won't hurt, but, don't go TOO big. You will lose bottom end.

 

HeyYou may be correct about the combustion chamber size, I tonight it was 62cc, but it could be 60. Been a whole since I shopped for heads. The FSM should have the info in there somewhere.

 

Technically, it is 'supposed to be' 60cc.... however, it seems that in reality, they range from 62 to 65.

 

so these heads probly wouldnt be any good?
http://www.summitracing.com/parts/RHS-20300

 

Those are bare heads, so you will also need to buy valves, springs, retainers, and locks.

If you want the bigger valve heads, have a look at these. Bit more expensive, but, they are fully assembled.....

Question becomes, just what do you want to do with your truck? Towing/hauling? Off-Roading? Drag Racing??

 

this truck is mostly gonna be used for off road mudding....