Magnum Heads

I built a 360 with magnum heads and installed in my 68 Barracuda in July of 05. I have almost 15,000 miles on it now and the engine runs great.

The only issue is I am running a very agressive hydraulic flat tappet cam that is plain just noisier than you would expect of a hydraulic cam. I also, get a fair amoutn of lifter noise when I first start the engine after sitting over night but it goes away within a few seconds.

The engine has 10.6:1 compression with zero decked pistons and runs on 89 octane fuel. It makes approximately 370HP based on a 102 mph 1/4 trap speed and has run a best of 13.7 with really bad 60' time of 2.2 seconds, so there is a lot more potential in it if I take the time to sort out the traction issues.

The combination of relatively high compression with a decent head design with an ideal quench clearance has the added benefit of providing 17-18 mpg around town and 21-22 mpg on the hiway.

It's truely a bolt on upgrade but I would recomend that you actually measure what you need for push rods and not just through the MP conversion push rods in the engine. I have 0.020" machined off my block which should increase the lifter preload but mine is right a 0.027" so it seems depending on the cam's base circle size and other varibles you could easily have a situation where the MP push rods are two short.