ARP main studs

Yes, the stud is too long. If you went for the ARP kit with 12 pt nuts, the nut will fit under the pump with no mod, but you will have to trim the stud down about 1/2" IIRC. It is easy to do. Install the cap with one stud, then install the pump with no gasket finger tight. Measure the height from the pan rail to the pump body. then, pull the pump and install the stud in that position. Measure up for the pan rail the same amount, and mark the stud. (whiteout or teflon threas sealant works well..) Take it out, trim it off with a cut off wheel (very hard stuff...), and use a thread file or chaser to make sure the threads are ok. Then, clean all the parts, and install it. The 6 pt nuts are a PITA, so I'd try to find one of those nuts if possible. I dont have any extra or I'd send you one. ARP doesnt ell you in the catalog about that...