Which Cam in 318

I'm getting ready to pull the trigger on buying cam, and I just want to ask one more time for anyones opinion on which is best suited for this 318 with headers, 302 heads, Edelbrock performer intake/Holley 750, 4spd with 3.91s, in a 1964 Valiant(approx. 3100lbs). I gave info to CompCams and they recommend the XE268H-10. I'm also considering the XE274H-10, because of future plans for zero deck pistons and a .040 bore. I'm adding specs below. I appreciate any info or opinions. Thanks Mike


XE274H-10 Specs

CAMSHAFT SPECIFICATIONS:


Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,800-6,000 RPM
Intake Duration at 050 inch Lift: 230
Exhaust Duration at 050 inch Lift: 236
Duration at 050 inch Lift: 230 int./236 exh.
Advertised Intake Duration: 274
Advertised Exhaust Duration: 286
Advertised Duration: 274 int./286 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.488 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.491 in.
Valve Lift with Factory Rocker Arm Ratio: 0.488 int./0.491 exh. lift
Lobe Separation (degrees): 110
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Grind Number: CRS XE274H-10


XE268H-10 Specs

CAMSHAFT SPECIFICATIONS:

Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,600-5,800 RPM
Intake Duration at 050 inch Lift: 224
Exhaust Duration at 050 inch Lift: 230
Duration at 050 inch Lift: 224 int./230 exh.
Advertised Intake Duration: 268
Advertised Exhaust Duration: 280
Advertised Duration: 268 int./280 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.477 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.480 in.
Valve Lift with Factory Rocker Arm Ratio: 0.477 int./0.480 exh. lift
Lobe Separation (degrees): 110
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Grind Number: CRS XE268H-10