So I have been saving my pennies to purchase the bottom end for the 400 based stroker and I have been looking real hard at the 440 Source 512 Kit. Just last night I was surfing the Summit Racing website and came across a 499 cu in package they put together that is supposed to produce 650-ish HP on pump gas and an ISKY .505 hydro cam. The kit seems pretty well complete and the article written on the build seems legit but I have a few questions that maybe someone can answer better than I...

First being, the 644HP seems generous given the cam used with untouched Eddy heads... Maybe I'm wrong but from other proven builds I have read about this seems to be more like a 575hp build... I have spoke with Hughes engines on cam choices in the past and the cam profiles we spoke about were a bit more aggressive than the Isky the kit comes with.

Second will be the debate over the rod length and compression height of the piston that requires a bridge for the oil rings. Is this areal concern for a street/strip car?

The parts chosen in the kit seem to be of good quality but I really dont know much about the SCAT crank and Rods vs the 440 Source thing. Are these the same parts sold by different vendors? Is the quality better from one vendor over the other?

Here are the links: https://www.onallcylinders.com/2015...ur-the-dyno-results-and-an-efi-surprise/

https://www.summitracing.com/parts/sum-csummst49901

https://www.summitracing.com/search/part-type/street-hero-mopar-499-combos