I sent this out to the machine shop a little over a year ago and it has sat in my basement in a dehumidified room and was sprayed with oil every few weeks. It is still in 100% condition from the time it's been back from the machine shop. Unfortunately I no longer own any of my 3rd gens, I was originally going to build it in place of my LT1 cause of all the machine work but decided I'd rather just build an LT1.
It's a 2 piece rear main block, non-roller block that spent quiet a bit of time at the machine shop. It is a bare block only and has not been reassembled since I got it back.
Magnafluxed to check for cracks, hot tanked, bored .040" (I believe but I will double check with my mic cause it might have been bored to .060"), splayed main caps (the 3 center ones), align honed and decked. It should be capable of handling 550-600 horses and will make for a perfect street/strip or full out drag motor.
Wheeler sells comparable machined blocks online for $1,100 + shipping. I'm asking $500 OBO... Flexible on the price, don't be afraid to make an offer. I'd rather it go to use instead of take up space and get damaged in my basement!