caleb22

I'm planning a 383 swap in my 76 K5 to yank out the tired Gen II 350, will reuse it in another project. No LS for me now, want to stay low complexity and get it done quickly. Goal is higher torque, economy, overall performance for a sometimes DD. No wheeling, TH350 trans.

I'm buying a new short block because I can't find a used block and no local machine shops rated well. May need to go to Charlotte for the 350 deck and hone.

Would like some cylinder head and intake advice and to know what you guys think of the cam specs, etc.

Maybe Trick Flow heads and a single plan edelbrock intake? 91 Octane preferred, maybe a 64cc chamber?


ATK SP52 383 short block (cost was tad more than 350 block)
(4 Bolt Main, 1pc Seal, Bore/Stroke: 4.040 x 3.750, Crankshaft Scat Nodular Iron 3.750" Stroke Externally Balanced Rear/Internal Front, Connecting Rods Scat 4340 Forged I Beam 5.700", ARP 8740 Bolts, Pistons Forged 3.7cc Flat Tops, Moly Rings, Compression Ratio: 58cc=11.9:1/64cc=11.0:1/70cc=10.3:1)

COMP Cams K12-409-8
Cam Style: Hydraulic roller tappet
Basic Operating RPM Range: 1,000-5,000
Intake Duration at 050 inch Lift: 206
Exhaust Duration at 050 inch Lift: 210
Duration at 050 inch Lift: 206 int./210 exh.
Advertised Intake Duration: 258
Advertised Exhaust Duration: 262
Advertised Duration: 258 int./262 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.458 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.458 in.
Valve Lift with Factory Rocker Arm Ratio: 0.458 int./0.458 exh.
Lobe Separation (degrees): 111
Grind Number: X4258HR
Outside Diameter of Outer Spring (in): 1.254 in.