Heres a link to marine specific heads. I am assuming the 540 is based on a big block chevy, There are 2 pages to see with edelbrock and world heads, and also matching intakes for the heads. I am not up to date on the pro 1 line so I cant honestly say. But I can bet my last dollar that edelbrock and world products have great R&D teams testing to build the best performing packages you can get.


http://www.jegs.com/webapp/wcs/store...cylinder+heads