[rlith]

I'm not so sure of that... The only difference I've ever noticed between those years is that the timing chain cover portion of the front of the engine has 2 pins whereas later models don't..(pins can be removed)

I have the late 95 motor in my blazer (odbII 1st revision, with the ECM under the hood and side post mount dist)... When my motor blew it was was easy enough to use a 92 cpi motor and moved the following over from the old motor without issue

timing cover (because of the CPS)
reluctor wheel
lower intake (because of the lock pin for the dist)
Dist

(this procedure can be done with later model enginges but you will also have to move the heads over as well)

etc... no issues...

Now I've had the motor disassembled in a 93, 95 and a 98 motor... the pistons are the same... Never notcied what so ever them being thinner on the later years...