Join Date: Nov 2000
Thanked 0 Times in 0 Posts
258 head bolt help - 7/16 head, 1/2\" block
I had the head from an 84 258 rebuilt and was ready to bolt it on to my 80 block this morning and realized when I went to insert the first head bolt that my block has 1/2" diameter head bolts. After a few minutes of cussing I decided to drill out the head to accept the larger diameter bolts that fit the block. Drilled em out and went to bolt it together, and now I find out that the 1/2" bolts off the 80 block are longer and bottom out before I can torque down the head.
So now I need 1/2" head bolts that are about 3/4" shorter than what I have. The head bolts are marked with six lines (grade 8?). Can I just go to my local supplier of fasteners and use grade 8 bolts of the right length? Any suggestions welcome!
The bolt to make this work needs to be about 3 3/4 long with 1/2" course thread.
84 CJ7, 258, HEI, M/C 2100 carb, 5 inch lift, RS9000's, 33x12.5 BFG M/T's, Lockright, full cage & belts, Xenon flares, AMC 20 1pc axles, GM dual diaphragm brake booster