Check out the S10V8 websites.Every truck is different depending on which mounts and headers you use. Being a 4wd also makes it a different application in some areas.Also,full length headers in some cases will hit the inside front section of the floor on both sides.Lip at firewall where it attaches to the floor has a lip that needs either cut and re-welded or beat back with a sledge.Driveshaft has to be cut in some applications,and etc.,etc.,etc.,,,,,This site is great but the S10V8 sites will answer all your specific questions.