I remember shoving a Muncie "rock crusher" up to a 327 in a 64 Chev wagon with the trailer towing package. Same deal...up on stands, drink some sudz, wrestle it out on your chest and say a few cuss words as gear oil poured out on your head. Good times
Now hey now. The 100LS was long on design elements but short on execution. I still have my dad's 4000s and cant bear to give it away to be crushed. It ran and drive until I parked it and all the lines rotted away. I would have a 100 LS- at least you had a 1/2 assed chance at getting it on the road compared to the new junk that is price prohibitive as it ages.