Decided to swap the no name rebuilt alt I put in 2 years ago when my OEM died in the middle of nowhere. Bought a 740 alt (88) off ebay for $20. 80 amp unit same size as 240 alt but different part #. Same/same unit.

Well the adjuster snapped off as it was rusted to shit. No biggie - that's what the big screwdriver is for...
The pivot bolt was frozen solid. Nut cam off the back end but the head would only turn WITH the alt. OK Bolt is frozen/rusted to the alt body inside the sleeve.

When the alt is swung all the way down, clear of the adjuster, the top bolt of the mount is accessible and when you swing it all the way up you can get to the twoi bottom bolts. The finagle it out thru the hoses and shroud.
Yup- bolts frozen solid so out comes MR GRINDER with a Metabo metal carbide blade- zip zip its done and the mount bracket is free.
Lucky I had decided to swap out the bushings anyway.
Home Despot has the replacement bolt- 5/16ths x 6 in in Rhodium plate. plus 2 washers and 2 nuts ( a sapre so you dont have to go looking when you drop the only one you bought).
Install the bracket(with the ground cable) and mount the new alt and hook up wires and belts and use Mr 36 in Screwdriver to set the tightness of the adjuster.

Done - Time 1 1/2 hrs. No skinned knuckles. 1 lady helped locading 2 doors and 5 galons of paint at HD.

The 740 80 amp alt is direct swap to the 240 despite the contrary being posted here bu others. If its a B230F alt its same/same.