454mag rebuild in progress
 

Alright, well I've got enough to start posting pics of the rebuild.
Jeff from JC Performance is doing the work.

The block is original mark IV, bored 30 over and decked.
It needs a bit more sanding at the cylinder openings, otherwise ready to go.

Re: 454mag rebuild in progress
 

looking great :D

Re: 454mag rebuild in progress
 

The heads are new dart iron eagles.
Jeff still needs to clean up the ports to get them to flow better.

Re: 454mag rebuild in progress
 

Pistons are new & shaved. Connecting rods are original, but redone and cleaned up, new ARP bolts.

Re: 454mag rebuild in progress
 

Crank is original, and has been rebalanced.

Re: 454mag rebuild in progress
 

What are you putting into it and what kind of power do you expect? What boat is it going into?

Re: 454mag rebuild in progress
 

This is for my 1995 Pantera 24SE.
Everything besides the block, conn. rods and crank will be new.
Will be putting a hotter cam in, 850holley carb, new intake, stainless marine exhaust. Expecting around 550hp. This will be dynoed.
Hopefully Jeff will chime in to answer these questions better.

Re: 454mag rebuild in progress
 

These are the 308s, and compression should be around 9.3.
Had to replace my oringinal large rectangular ports since one was shot, so Jeff suggested these. And I know the originals are too big for marine use.

Re: 454mag rebuild in progress
 

what drive do you have and what is your dimension from the prop shaft to the pad?

Re: 454mag rebuild in progress
 

I know my X dimension is around 17 1/4".
I currently have a bravo one, but I'm thinking of changing to an XR upper.