My motor is a 535 stroker with a set of box stock set of victors, roller cam, and 12.5 to 1 comp. It made 758hp@6500 and 728ft lbs@4300. When I was building the motor i talked to Dale Chenoweth of Chenoweth Speed and Machine and he said there was little to no difference between the Indys and the Victors. I also ran the stealths on the previous moter which was also a 535 with 10 to 1 and a solid cam and that motor ran 6.90 in the 1/8 in a 69 dart and those heads were also straight out of the box, no port work. So any of the heads will get you there but the stealth can with a port job and they are alot cheaper. It just depends on the future upgrades that you are planning and buget. You could also save $$$ with the stealths due to not having to have the offset rockers and lifters but the will need a good port job.