I have a 96 with a 5.8. I'm looking to purchase another motor to start a rebuild/upgrade on so when mine decides to shit the bed I have one ready to drop in. My question is, what are the main differences between the 5.8's in the 94, 95, 96 year (94+ is roller irrc)? If there are any differences will they matter if I plan to go with a gt40/p head etc? I know some of the years have an air pump, some don't, so just trying to clarify so I don't buy an engine I can't use in my truck. Been on the forum for a while but posted in the noob section because I figured this is fairly common info, I've just never read on the subject before.