I was in the process of building a ls/vtec when I came across a good deal for a built b20 block with high compression je pistons. I pulled the pistons and rods to have arp rod bolt put in and I noticed that the pistons are stamped 83m. Will this be a problem with the b20 block? I thought it needed 84m pistons. Also, since I already have a b18 block should I board it out and stick the pistons into it?