Magnum Heads

I had a very hard time finding magnum heads that weren't cracked. I had one good head out of eight that were pressure checked. The stock heads are junk and should not be used, the chambers measure 67cc's and need to be milled a lot to get the compression up, further weakaning the head. I bought the heavy duty magnum heads bare and reused some magnum valves. Had to have the spring seat cut to fit the 1.5" valve springs and the retainers are hard to find. I used Hughes springs and they have the retainers to fit the 8mm valves. Bolted on the heads and the rocker arm nearly rolled off the edge of the valve. Installed lash caps and the geometry is a lot better. I used the Crane chevy roller rockers and they fit like crap. Had to grind a wider slot to clear the stud.
Not much of a choice of intake manifolds either, you should use the angled I would just call Hughes Engines and order there heavybypass hose intake. I found a Mopar M1 dual plane that I'm using.
The magnum accesory holes are a little bit different causing alignment issues.
I havn't even started the kickdown and throttle cable yet.
A lot of the problems are due to me trying to save some money.If I had to do it all over again I would just call Hughes Engines and order there heads and rockers and studs, guideplates. Bob