Set them up for the 525efi cam

that's big power & torque

Esp from a 250 blower without an intercooler

I have the 420 mega blower with a chiller not a 250

I'm also running at 4000 ft not sea level

Basically a duplicate of a 525efi cam posted by Mild Thunder a few weeks ago http://news.compperformance.com/wp-c...I-Camshaft.pdf

Will this cam be good for carburetored

Also do I need to change lifters etc for this cam swap

You may think you are saving work by pulling the heads in the engine bay, but that is not the case. It is a huge PITA working in an engine bay. Pulling the motor and having it on a stand will save you a ton of work especially if you want to swap the cam. Aftermarket heads may not gain you a whole lot on the intake side (with blower) but would definitely help on the exhaust side, especially if you are going to spin it higher...the right cam will help take full advantage of the heads also.

Here's a thought, do not pull the motor, just do the blower and chiller (in the boat) this year. Accumulate some hours on it and collect some parts over the summer. In the fall, pull the motor and take your time, do it right. Who knows, by then your boating needs may change and you could be looking at other boats?

so I just pulled heads think god I am boarder line headgasket blow out actually was barely leaking