Comp Cams Xtreme Energy 268 ?s

My 120,000 mile engine is getting a basic stock rebuild with a .030 overbore. It does/will have an Edelbrock LD4B intake & 1406 carburetor, double roller timing chain/gears, MP electronic ignition, factory exhaust manifolds with FlowMaster 40s and 2 1/4" pipes, factory heads (with hardened valve seats), A904 transmission (stock convertor), and the factory 3.23:1 sure-grip 8 3/4" rear-end, with P245-60R15 tires. Manual brakes (SSBC front disc, factory rear drum).
I’d follow Toolmanmike’s advice on this if you’re staying stock. You might consider buying the cam and lifters from your mechanic if you plan on upgrading later.