Help on my build for pulling

Get your head o ringed at least while it is off. You only need a different head gasket if the block is decked, or if you need a little more PTV clearance. I ran 24* with a box 464 a few years ago and it liked it pretty well, but depending on your spray angle on the 5x21's you might not want to go to crazy with it. Oh and I am still working on the cover for you! I have not forgot just been busy.
 
Oh and Cummins only for the head gasket.

I have no issues with running PAI headgaskets. Seen a couple of their kits ran on 1200hp+ sled trucks with no issues. And they go for broke with em. Really really good quality gaskets for a little less than Genuine Cummins. I was a Cummins only guy till I seen the quality and the abuse these have taken, and am a believer in them now.
 
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