Next step for more HP (383BB)

So I'm looking to add more HP to my 383BB I built last winter.

Currently at about 420hp (crank) would like to get to that 500 mark or a touch more if possible.

What would be a good direction to go off my current build? Port work on the heads, port match intake, prw 1.6 rockers, more cam?

Can I go to a blower setup with the compression I currently have?

Current engine specs. (Some rambling in my notes sorry)


Bore - 4.280

Stroke 3.38

Rod length 6.358

Gasket bore 4.40

Block deck height 9.960 (stock=9.980) Took .020 off

HG thickness - .039 (Felpro)

Piston to deck height - .000 to .005

Piston volume - (-6) (KB400 .030 dome pistons)

Chamber size – 84cc (I'm using sidewinders from Mopartsracing.com *Todd*)

Total comp = 10.01:1

Comp Dual valve springs (925-16)

Comp retainers (741-16)

Comp super locks (611-16)


Comp Cam XE274H part number 21-224-4
Intake 274/488- Exhaust 286/491


Additional specs:

Weiand Action plus intake

MSD Pro-Billet Distributor with blaster 2 coil

Fel-pro valve covers (fel1612) work with mopar valve covers

Pro systems Holley pro series 4150 carb

Holley blue fuel pump (7psi)

440 source aluminum water pump (160 thermostat )

3400 Dynamic converter (Frank Lupo)

30” rear tires M/T

Dana 60 3:55 gears

Truck weight 3650#


Tuning Sharadon Performance (70 primary jets)- (13 initial timing, 34 all in at 2800rpm)

451hp Engine Dyno (open headers)

420hp through full exhaust (started at 346)

364hp at rear wheels (started at 301)

364 rear wheel hp= 451 crank HP