Am i able to put on a B20 head on there? if so, is there any increase in numbers? i know that you can't bolt a b20 head to a ls, but i just read that someone had put a b20 on their ls. so just making sure. also, what is some parts that i can get for my ls that will increase my numbers. Any cheap rods that i can get and they are stilll good? sorry for the noob questions.