HGello,,to all,,I am trying to get the right rod and main bearings for the 454 in my Silverado C10. I gave those numbers on the backs of the "OLD" rod and main bearings to the place where I ordered the bearings but they must of sent the wrong size main bearings. I plasti-gaged the mains using the "green" plasti-gage.001-.003 and did not even crush any of the plasti-gage.! I then tried the "red" plasti-gage .002-.006 and still no crush. Next was the "blue" which is .004-.009 and some crush. Last was the "yellow" wich is .009-.020 and it indicated a tad more clearance than .020,,,!! WTH,,??
The following numbers are on the back of the "OLD" main bearings= AB 84, 8191AP-U, 6-35 C, 7-36 DA 49. The 5 main journals caliper to 2.740.
The following numbers are on the back of the "OLD" rod bearings- 6057CF 020. The rod journals caliper to 2.180.

Could it be that the main journals require .020 oversize bearings?
I'm assuming the 020 on the old rod bearings designate .020 oversize as well?? I cannot plastigage the rod bearings on the crank as the rods are at the other place, 50 miles away.
Somebody PLEASE help,,,!!!

 

I'd think .003"-006" would be my guess.