[X-TECH MAN]

Originally Posted by Alan Roehrich

Before you go any further, you need a copy of the rules. I suggest you find someone who has an extra copy of a recent rule book, like the 2009 rulebook, that they'll loan you or give to you.

You cannot run roller rocker arms in Stock in NHRA. You should not try to run a 7.5" 10 bolt, you can run an 8.5" 10 bolt, an 8.625" 10 bolt, or an 8.875" 12 bolt, but that 7.5" 10 bolt will likely break, and then you'll have to build a good rearend anyway.

To find out what class your car fits, and what engines you can run, you look in the Stock Car Classification Guide. To find the specifications on the engine, you look in the Engine Blueprint Specifications. To find these lists, go to the NHRA website, and click the "Competition" tab. You'll also find the accepted connecting rod list and the accepted piston list.

Good luck.

The roller rockers are legal in IHRA ONLY and they have to be the correct rocker ratio. 1.5 in your case.