The shop made a big deal about those bushings,they actually farmed it out to local non automotive machine shop.I don't take my business there any longer.
The machine shop I'm using now is leary about milling .060 off the block deck.They recomend the tighter quench but done with a rod piston swap if possible.Or just order custom pistons to fit the 261 rods and be done with it.
Armond sent me a Silvolite piston catalog.Using a GMC rod and a 3.1 Buick piston gives a lighter piston with a more modern ring package than the heavy 261 piston with fat rings.But the piston position at TDC is still about .060 below deck.I believe the Buick also uses a pressed pin so goota deal with that.The 225 Buick V-6 piston has a better compression height but only comes as a dished piston as an inexpensive cast piston.
In the long run my ideas butt up against the reality of spending 500 plus dollers for a small degree of improvement.
