stock bottom end 5.9 mag HP potential

He said 4 sp so he needs a flywheel. Here's a post on another forum where I worked out the proper balance weight.

http://www.moparchat.com/forums/showthread.php?t=71263&page=5

Similar info posted here:

http://www.forabodiesonly.com/mopar/showthread.php?t=178065&highlight=magnum+flywheel

It's different from an LA 360 but not by much. There is wrong info out there on the weight. There are no factory 130 tooth flywheels so you're stuck buying an expensive aftermarket one (about $350 IIRC) or you could balance a neutral one, or you could take a chance and use one from an LA 360. I may get flamed for that statement, and I'm not recommending it but take a look at the numbers. A few guys have used weight that is clearly a lot farther off, one racing oval track and the engines lived.