I am by no meams a know it all of LT1's, just what I learned building a motor for my '95 Z-28. You will want to look for a vented Opti motor. These optisparks have 2 vacuum hoses, 1 off the intake and the other, plumbed to the intake elbow that pulls fitered air. This loop helps keep the opti from building up condensation. Vented opti's would be '95-'97. I wasn't aware any of the LT engines had cast iron heads. Early '95 Camaro's had the OBD 1 ECM's while later '95 and up were OBD 2. Most guys who like to play with these engines like the early ECM's for the ease of use. There are many out there that can fine tune and reburn these ECM's to your mods. If you decide on LT4 stuff, the head and intake are a package, meaning you can't mix between the two. Decide if you want a manual or automatic and buy appropriately, I believe the ECM's are different in this respect programming wise. One last thought, you can buy any 93-94 LT1 and mod it to a vented Opti. You just need a '95 cam, timing chain cover, optispark and vacuum lines.