Good morning sir !! Go with a kit from scatt rotating assembly nice product and a forged unit if you can and I beam rods no clearance issues also might look into a small dish on the pistons compression is going to be high with those heads I know all to well about electrical crap I’m looking for a harness for my r/T had these guys butcher my fuse box now I have to rip it out and send it out for a restoration or something my truck runs but that’s about it waiting to drop a 408 in it