Horsepower Estimate?

The magazines create unrealistic expectation. An xe268 will likely be a high side of 1.1hp/ci stick in an oem style/stock headed 340-360 with a great tune up.

If I told you Billy Barty was 7 feet tall and had a tape out (dyno) that showed he was 7 feet tall, would that be ok? What if you met him and he was really 3ft 9in. Just because it's the data you see or read doesn't make it valid, nor supportable when other data shows the build is way off base. I've said it many times, built a couple 360's with a xe268, rpm/ld, 750dp, dougs/tti/5204's and good OEM heads (equivalent to the dyno derby pieces) and NONE of them made more than 360hp. NOT ONE.

I'm not going to engage in this with you, carry on if you like.

Selling parts is job one for them.