the 505 I have on sheet, as far as spec's go, the lift is over .600" with a good little bit of duration, and a whole lot more. But this engine, no NOX, no supercharging, and no turbocharging was an easy 700 horse power.... The heads are gonna be the Bull Dog Track Dog heads, fully worked and such. The cam is a fast ramp solid, and the rockers are gonna be those factory style stainless steel pieces... the crank is 4.25" custom lieght weight forged pistons through Ross..... and a lot more. Heck, I even just came across some main caps I like, they make a 2 bolt main block into a 4 bolt main, cross bolt style, block..... I'll try and find that site.... These spec's are just off the top of my head, so there's a whole lot more to it than just this. The oil pan is custom made... The oil pump is one of the Keith Black pieces, and much more.... So... Heck, I've talked with a few cammanufactures, and Chryco (I think) had told me to call up this guy, we talked for a little bit, he had changed companies, and is now where ever he's at now, but I want to say the guys name is Steve Slavik... I've yet to find all that paper work that I'm still looking for.... Man I have a hard time trying to keep up with some things...