So i found a 454 short block at daddysos marine in pompano near me. bored out .30 with some domed piston and a stroker crank, still getting the details, but it does have a steel crank studded and aftermarket rods. When i asked him if it was a 496 rotating assembly he said know just stroker crank. So how does that compare??
From there he said he would warranty the build and throw brand new gm rectangular port heads on it,and a gm 502 cam with aftermarket oil pan. He is telling me 10.5:1 compression i told him multiple times i want a 500 plus hp motor... what do you pro's out there think..
I have a .6 lift bob m cam that i wanted him to install but he wants to stay from that and again put in the 502gm cam...... Please give me some feedback Thanks

call refs dude. S fl builders are a crap shoot unless you go big bucks

std bore on a 454 is 4.250,so +.030 with a 4,250 stroke crank makes it 489 cu in,it would need to be bored +.060 to be a 496.i hope this info helps you to understand.

I was referring to the whole build together being a solid build, I understand a 496 rotating assembly has a .5 longer stroke.... His build has a strocker crank so am assuming a .25 longer than stock stroke but his connecting rods are stock from what he told me, he has been in business 20 years

I think compression going to be a bit high...

He's going to let me know today the piston dome size. Appreciate the input

i think it will make 500plus hp look at the parts there should be part numbers on the crank

unless you are getting a "steal" of a price i would steer clear and just look for a 502 setup. the reason being, the 502 has a forged crank, rods and pistons, 4 bolt mains and a roller cam right out of the box.

and, i agree, 10.5 to 1 is a bit too much compression for an iron head marine application.

I have heard ALOT of horror stories about Daddy-o's also

Rod ratio isnt ideal using a stock 6.135 rod on a 4.25'' crank. Better off with a longer rod, 6.385.

GM 502 cam means nothing unless we have a part number, or cam specs. GM offered several cams in 502's.