New 318 build, just need some input.

Ok guys what I have is a 1969 318 and I have a plan for a rebuild.
Block needs to be bored at least .030
My plan is to use the stock crank and rods with KB167 pistons for the bottom end.
302 heads with stock valves and a little unshrouding around the valves
Comp Cams Adv. Duration 268/280, Lift .477/.480 I think it's known as the XE268.
Mopar M1 dual plane intake 650 cfm DP carb and Summit headers to 2 1/2" duals
I'm running a 4 speed with an 8 3/4 rear 3.55 gear
With the KB pistons and that comp cam will I still have enough piston to valve clearance? Should I run a lower lift?
I will check clearance but I don't want to buy another cam or cut the piston eyebrows.
Would I be better off with stock replacement pistons?
I think the combination I put together is pretty good and being on a strict budget I'm using the 302's because I already have a fresh pair. The only big expense will be the complete cam kit, pistons and machine work. Strictly a street car but will see a few 1/8 mile runs at the track.
I want to keep it under $2000 so the wife doesn't freak out lol
Thanks for any and all (on subject non argument) input guys.

PS, It's just a "street car" guys and I won't be looking for 12 seconds in the 1/4