I don't even think Billboost could have it out in 3 hours. Try 6 hours to pull it and 7 hours to put it back in.
Though I am getting the timing down to an art now. Remove the drivers side valve cover, rotate engine until #1 valves are both loose. This is now TDC. Even more surprising, I drop the dizzy in and it was one tooth off from #1, move it one tooth and it falls right into place. No tweaking of the pump shaft. Damn I'm good!! LOL.
I did conduct an experiment yesterday with the engine brackets. I placed 3 washers under each bolt of the bracket to frame to try and raise the whole engine assembly. Total height increase was about 3/8". This worked very well because the oil pan doesn't sit on the front differential anymore.
1997 Pontiac Bonneville SEi-SCRAPYARD
2000 Chevrolet Blazer LT 4X4 4.3L
2002 Chevrolet *-10 LS Ext Cab 4X4 5.7 V8