That will be a nice build regardless but I'd say griff would pretty close estimate.

I got 630hp with that combo, and 612HP, with the stock 525sc camshaft in it.

Stock 525sc cam, was 228/236 114 LSA .530/.551

731 cam, is 226/236 112 LSA. .587/.610

That would make sense to me. If I recall, griff replaced his stock flat tappet cam in his 525sc, for the 731, and picked up about 100rpm. Thats probably around 20-25hp gain. Cams are fairly similar duration wise, a bit more lift /lifter acceleration with the roller design. Thats about what I think should be expected when going from a flat tappet to hyd roller cam. Its certainly not 50+HP like some may suggest.

Thats figured with small headers and right about 5lbs boost. I am sure if its dynoed with big tube dyno headers , those numbers will be higher. Prob 650 plus with the 731 cam, dyno headers, etc.

Correct on the 731 swap.
I was running the stock bottom end with 7.5 CR pistons and about 7.5# of boost. I estimated I was around 560-570hp.
I figure the extra boost I had and his 1 point higher CR are pretty much a wash for HP.
I'm not sure how much the promaxx heads will gain hp wise. Maybe 20-30hp???

so what kind of speed you thinking?

TRS right? set deep?

77mph

Bravo, set in the middle......

Thanks MT..... Im now in the catagory of making more than I planned. Original plan was a legit 525 at the prop or so.........

Rob what exhaust you have on there?

I have a set of stainless marines, with regular risers and a set thats dry to the tip. I would like to get by with the standard risers if possible so I dont become that guy with the noisy azz boat.

My fully jacketed stellings , with gaffrig superflo series mufflers, switched to closed , sounds as quiet as a set of stock 330s.

So maybe 80?