Parts swap on industrial 318

67Dart273 said
I would not use those heads. Pretty sure you cannot put other intake manifolds on them--the coolant heat crossover

Might be the pistons are heavier, don't know.

I ran a ported set on my car for years with a edelbrock performer & a weiand action plus manifold. Block the coolant passages as per post #4 and your good. I also ran coolant through the manifold for a while at the start but it eventually leaked and dropped some coolant in the oil. No leaks after blocking them off.
Good point on the ballance though - would be worth checking the weight on the factory truck pistons.

Furious59 said
If we need to replace those pistons, how would I go about getting new ones? Places I have checked only list pistons for regular 318’s that have valve reliefs in them.

Speed pro H814CP hypers have no valve releifs and a slightly taller compression height than most standard replacement pistons. They take the magnum ring pack - I think the oil control ring is a different width to the regular LA stuff.