I have a chance to buy a set of 243 heads off of a 6.0 and a 224 cam. I have a 05 GMC with the 5.3. would like to get input if its a good set up or not. Of course gonna add headers and a tune after the swap and a CAI. Just checking before i buy on how its gonna be. Thanks guys

 

You'll need to mill the heads .030 assuming that they're not already milled to keep your current compression ratio.

Personally I think the cam is a bit big if you're not going to put a stall on the truck.

 

Yes i plan on adding a stall in the near future

 

that combo mill the heads .050 gain some compression and a 3600 stall with 410s it will run good

Cam is a bit big but will work
I prefer less cam and stall for my daily but its all in what you want!

 

Am i gonna need to mill them .050 or .030?

 

I go .050 so u can bump the compression up for that cam

 

.030 gets you back to stock compression ratio
.050 gains some compression

 

Thanks guys. helps alot will post when i get it done

 

Is more compression better? I only ask im looking into the samething only with a 220.

 

more compression helps make a little more power and improves bottomend a tad
Basically yes it helps