I finally pulled the engine out and found my vibration problem i was having........The adapter flywheel was way off balance......
I had only run the bus in the shop and made a couple drives around the block so far because i had a bad harmonic vibration at 1500 rpms ........I wasn't going to put it on the road until i resolved this problem...........The flywheel kit i ordered from Kennedy was for an 85 2.8 S-10 motor......... which is externally balanced......... The engine i finally put together was an internally balanced engine........86-up...........
Heck..... I didn't know there was 2 different 2.8's on in the S-10......

..... The truck i pulled my engine from was a 1985 GMC Sonoma..... I had already ordered the flywheel kit for it and had it for 6 months before i built the engine........ when i had the machine work done they told me it was an '87 S-10 motor...... someone did the Ole switcheroo.....

....This 2.8 is better though with the bigger mains it'll be stronger.....
Man i drove myself crazy trying to find the problem short of yanking the engine out and a tear down...... I really didn't want todo that............
Well, the machine shop balanced it......they said it was about 14 oz.s off..........Like i was slinging a tennis shoe in a drier .......
I hope to put the engine back in this week and do a test drive.......I also am changing the Kennedy Stage 1 clutch out for a Stage 2......... I have been thinking the bus is pretty heavy and i will be towing occasionally with it........so why overpower the Stage 1 and save it for one of my bugs............We'll see how the pedal feels .......
