You are right, Milder might be wrong word, but it has slightly less overlap looking at only the 050" duration. Ron did not give me the advertised numbers of this cam.

OK, I bought sporl performance 240/245 cam. Ron said it would make 650-675hp in marine trim with 9.8 to 1 comp, 12" vacum @ 800rpm idle. 650-675hp seems high to me, i think he meant std corrected power, wich means approx 625-650hp j1349 corrected. I would be really pleased if i makes 625hp.

Because it is. The cam has the potential to make that much HP. Your build does not.
I believe you have a good mild build going on, not a 1.31 HP/cuin build.

Fwiw I know someone that used that ron sporl grind in a modded 502 mag, had a chopped down , extrude honed intake, bored tb, dart heads. He advised customer to advance it some, guy randomly advanced it i think 4 degrees without bothering to degree it, broke 620 hp on my dyno at about 5500/ 5600 using J607, dry dyno headers with mufflers and no accessories fwiw, Smitty

I've seen 630hp w/ a crane 240/248 ls112 for an 8.1L in a gen 6 502,cams a double swap,dart heads 10-1 compr. on an ego breaking dyno.:)

Ron advised me 106-108icl, hopefully my tunnel breaths Lil better than the modified merc intake. Stainless marine manifold would have robbed atleast 20hp from that 620hp.

The tunnel ram and exhaust will not be the limiting factor, the heads will be the limiting factor.

Cant wait to see the flow numbers after valve/seat job, and bowl/chamber blend.I think the 2.3" intake valve should be plenty, and the port itself is the restriction. Intake port CSA is around 3.0sq" untouched.

Got the cam card

https://cimg6.ibsrv.net/gimg/www.off...e0cd4de6b8.jpg

will be interesting to see how that 5° split does for power.