It's got a forged bottom and ported heads, D-1SC w/16lbs.
I run 555R 275/40/17 on the street and they are worthless, I think i'll try the new MT DR's coming out. I run MT 26x10-15 at the track, thats when it gets fun! :D
Ya..when the motor is out put on the long tubes and look hard at getting rid of the IRS and go with solid axles. I love the hook you get off of a solid axle and slicks, don't try slicks with the IRS or you'll need a tow truck.
With a stock bottom end don't go much over 10psi. and you will need at least 42# injectors. The Procharger kit should come with the fuel pump, I think it is a 255. Check with Procharger and they will let you know what comes in their kit. I had to buy injectors (I went with 55#), MAF (I went with...
I had the same problem with a twin 62mm from BBK, they exchanged it and I havn't had the problem with the new one.
I've been using the one they exchanged for 2 years now with no problems.