403 Oldsmobile

[Bob Shaw]

Originally Posted by SSDiv6

Pete Kost drives Bill's former Oldsmobile and it is still powered by a 403.
It is one of the most successful 403 powered Oldsmobile's in Stock eliminator wining many races and setting many records

All 403 blocks are windowed; there were no solid web 403 Oldsmobile blocks.

According to the late Joe Mondello there were about 2500 solid main web 403 engines built. Most of them were in 1977 Buick station wagons. Block casting number is 557265-4A or 554990-4A. My son has one in his Cutlass.