the aftermarket 6pak replacement piston might make too much cylinder pressure with that cam and closed chamber alum heads. an iron open chamber head and a kb184 piston will work, or an icon 836 piston with a closed chamber alum head will work. all this is if you want pump gas friendly engine.


that cam looks like the mopar replacement. if so it's 213/225@.050", not what mopar states. small cams can build too cylinder pressure creating detonation. too much cam causes tuning headaches for most folks and aren't always value adding.


if going back to factory type spec i'd do the kb184 piston with an iron head. I've done this several times and it is more economical the alum heads with the proper piston. my favorite street engine was a 440 with 6pak, kb184 pistons, mild cam upgrade, and mild head mods. not the most powerful I've had but very reliable and fun, and i'd do one again.