318 LA build

The spring you want is the gm 3100 valve spring.

It's funny how lots of guys will say they will never go with the magnum because it has a chev style valve train thats weak. Lol its just fine for 6000 rpm or so. The weak point of chevs valvetrain always seemed to be the cheap *** stamped rockers. Pushrods will punch a hole thru the cup area.

As for the magnums cracking,I dont really fear that either.Yes they crack but I think it's kind of an urban legend thing thats blown waaay out of proportion.