73SwingerBuild
Well-Known Member
Looking to thin out my extra parts here, and have not heard anything back from anyone regarding it being the motor for their car, so I'm looking to sell my extra 1973 model year 340.
I have not had a machine shop inspect it due to $$$, but I did perform my own measurements with my digital micrometer. It is currently bored 0.030" over. As far as I can tell, the main bearing and connecting rod journals have both been turned down 0.010". The part numbers on the bearings are both hard to read but there is a ".010" stamped on both the main and connecting rod journal. I believe they sell bearings for 0.020" and 0.030" over, so having 0.010" off is just the first stage. Plenty of meat left.
It is a factory cast crank motor, though research suggests that these cranks may have been hardened. The connecting rods might be stock (not sure) but the pistons are definitely aftermarket. I didn't see a part number anywhere unfortunately. Definitely aluminum.
Here are the numbers stamped on it:
Pan Rail: 3B234531
Date Code: __ * 26 * 72 (not sure why there's a space; maybe it's supposed to be 2 * 6 * 72)
Part #: 2780930-340-8
Pictures below.
Asking $350 for the entire bottom end (crank, pistons, rods, all bearing caps, and I think I might even have a spare windage tray and timing cover to throw in.
Located in North Smithfield, RI (02896)
Prefer pick-up, but I can deliver within a reasonable distance for a fee or you can arrange shipping. I have pallets.
Thanks all.
-Mike
I have not had a machine shop inspect it due to $$$, but I did perform my own measurements with my digital micrometer. It is currently bored 0.030" over. As far as I can tell, the main bearing and connecting rod journals have both been turned down 0.010". The part numbers on the bearings are both hard to read but there is a ".010" stamped on both the main and connecting rod journal. I believe they sell bearings for 0.020" and 0.030" over, so having 0.010" off is just the first stage. Plenty of meat left.
It is a factory cast crank motor, though research suggests that these cranks may have been hardened. The connecting rods might be stock (not sure) but the pistons are definitely aftermarket. I didn't see a part number anywhere unfortunately. Definitely aluminum.
Here are the numbers stamped on it:
Pan Rail: 3B234531
Date Code: __ * 26 * 72 (not sure why there's a space; maybe it's supposed to be 2 * 6 * 72)
Part #: 2780930-340-8
Pictures below.
Asking $350 for the entire bottom end (crank, pistons, rods, all bearing caps, and I think I might even have a spare windage tray and timing cover to throw in.
Located in North Smithfield, RI (02896)
Prefer pick-up, but I can deliver within a reasonable distance for a fee or you can arrange shipping. I have pallets.
Thanks all.
-Mike
