.030 5.9 magnum

View attachment ForumRunner_20130801_225357.jpg

Top piston is stock out of a 89 block 318
bottom is what I pulled out of the magnum today.

The numbers inside are 8290 or B290. I can't find anything for either.

Either way I'm getting the 107's to get my cr up. I'll deglaze the bores and have my new pistons balanced to my crank..

Anyone want some LA block 360 .030 over pistons? Lol