Building 69 383 for my 69 dart.
It's not hard to look at summit for pistons.... It's not a rare or awkward engine.
Here are my specs if it helps at all.
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
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
