Timing Engine - To What Degree

[camaro1969]

I am timing my SBC, since it has a lot of aftermarket parts, i cant really go to a spec book and see what i should time it to. I was hoping to get you thoughts.

Engine specs below

SBC 350, Th350 Auto, 12 bolt rear 3.07 gears, 15 inch bfgoodrich t/a radials...

Cam:
Comp Cams #249-CL12-242-2
Xtreme Energy XE268H Hydraulic Flat Tappet Camshaft
Lift: .477''/.480''
Duration: 268°/280°
RPM Range: 1600-5800

Other:
1479H keith black pistons .30
139 piston rings
CLE-CB663P rod bearings
CLE-MS909P main bearings
CCA-817-16 compcam lifters
SLP-260-1000 gasket kit
CCA-981-16 compcam valve springs
CCA-1412-16 compcam roller rocker
ARP-134-6003 arp connecting rod bolt
Non electronic distributor or electronic ignition