Brent made a good guess.
And I know you don't want to spend for what Jerry's recommending-which is cool BTW.
I didn't know you had a 4.125 stroke and .025 overbore.
But here's some numbers I'd run by Brent (assuming you chose him) were it my motor,
used your way.
4.25 stroke which prolly means new pistons (10.5 to 11.:1) on your 6.48 rods.
Polished heads are useless and port match is slightly less so but more effective on big power builds. You need to get the heads at or over 300 and 210 cfm-so let him port (CNC) them, do bowl work, short side radius and maybe back-cut the valves. (Are the intakes 2.08 or 2.19?-Maybe notch the bores for 2.19's but ask him)
Once the heads aren't a restriction, cam it with at least .100 more lift on both sides, a tad more exhaust than intake duration and a 110 LSA. Springs would be very mild and street friendly at those numbers and 6000+/-.
Maybe a 950 which I think he likes.
He could easily produce 600 lb/ft + at that size and chase boredom from your drab existence.
But follow what
HE tells you.
