Okay so not sure if this is right spot but here i go. I gotta 1984 regal with 1987 olds 307. If i recall right the heads are 7a. Havent been smart too look at numbers on it even tho ive seen em. What are the recommended books to try to get proper diagrams and whatnot. First car ive put time and money that tryna eliminate overspending or placing wrong add ons that i may later want to persue but thats only day dreams till i learn more. Im not the mechanic on it and i try to stick to the one who got it running. I can post pics later. Trying to go bout the right way. Besides leave it to the wrench turners. Thanks look forward to sharing this adventure i hope gets better.