[400 Lemans]

Originally Posted by PAUL K

Agree .... Only issues might be some noise and premature wear. What may cause an issue is if the rods were installed backwards along with the pistons. But if there is adequate rod side clearance that wouldn't matter either.

Saw this happen in the late 70s. Had a 67 GTO that was smoking pretty bad, so i tore it down for a rebuild. I thought it was still all factory but it had obviously been into before. The rods were mixed up to the crank and were tight. They had heated up so much that the big ends and caps had turned blue. Didn't spin any bearings though, but did have a very low, dull knock to the engine.

[TRADERMIKE 2012]

Originally Posted by 400 Lemans

Saw this happen in the late 70s. Had a 67 GTO that was smoking pretty bad, so i tore it down for a rebuild. I thought it was still all factory but it had obviously been into before. The rods were mixed up to the crank and were tight. They had heated up so much that the big ends and caps had turned blue. Didn't spin any bearings though, but did have a very low, dull knock to the engine.

I posted the schematic in this thread of the lower bottom Crank/Piston Journals, are the #'s in spec?