rebuild C block or J block

[jmason]

I have a 85 K10 with 170k miles. Uses little too much oil. trying to decide to rebuild C block or buy J block military surplus?/

[john8662]

When you pull your block apart, you'll want to pay close attention to cracking on the main webs. If you have a crack free stock bore block, then go with your block, at least you know something about it. As far as a C code block and a J code block there are NO differences, absolutly the same block. The differences come in the pre-cups in the heads and the intake that bolts up top. So if your block is OK, rebuild it. If its cracked, then go for the surplus block to build.

[grape]

My '82 c block had no cracks at all after 22 years of making absolutely no power. smile.gif

[84 C2B2]

Any figures on how much one would pay for a block with no cracks, .030 over with new cam bearings and block hot tanked ready to go?

Jerry

[Peter J. Bierman]

Depents on the casting number, some blocks are more wanted then others.

Peter