383 power upgrade help

273 said
I'd probably go with stealth heads there cheap and have decent hp potential, as for cam I wouldn't go crazy with 1st round, (you'll probably do many upgrades to zero it in). Depending on rear gear and cr, don't need a ton of rear gear the OD trans has a very steep first gear 3.09 problem is second gears is 1.67 fairly large drop making choosing ideal rear gear tricky (probably 3.55 on a 27" tire, taller tire go with deeper gear). Around 225 to 230 cam on a 108/110 with around .500" would be the ones I'd be looking at.

With the OD ratio and 3.55’s rolling on 28’ tires, do you know what rpm that translates into @ 70 & 80 mph?

Jeremiah said
If you are down on compression ratio you can angle mill your cylinder heads to get the most CC off of the big side of the chamber.

Do not angle mill the heads!

Just mill the deck flat.

@PRH , the below, can you comment on the Stealth heads as cast vs the 440 source CNC ported versions vs your take on what can be done to them or not? Thanks.

Jeremiah said
A set of 440 source Stealth heads flow better than most ported stock heads which makes them a good, inexpensive option. I would have a set shipped to Porter Racing Heads for prep and have him send you a cam when the heads come home.