Nitrous plumbing A1A...??..

As far as the 8553 head gaskets I say to each their own but the bottom line is from what you have mentioned about your engine you should be looking at cometics for the correct clearance. My pistons were .017 average out of the hole and I went with these https://www.summitracing.com/parts/cgt-c5622-056/make/dodge Probably not what you want to hear but its a worth while investment to know things are right.