Quote:
Originally Posted by Jeff Stout
Also I was surprised when removing torque plate cylinders were. 0015 out of round up top. Bolted plate down again and checking cylinders were round again. It surprised me.
|
Normal for the the Oldsmobile 307 and 403 blocks.
They are of a lightweight design, light and have scalloped and windowed mains. For a full race engine, you can fill the block and used a girdle, or sleeve to a 307 bore size, a 1968 thru 1971 high nickel block.