New 318 build, just need some input.

wolfhammer said
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

I noticed you edited your post after my reply. If you're going to run those heads and cheap as the goal cheap usually means more work so don't chince out on the more work part or you will really regret it... they are the worst flowing as cast 318 ever made. No lie. The numbers are way behind .100-.400 lift as cast.
I'm not going to tell you which videos to watch cuz I think that's tacky but you can find some on YouShit showing what's necessary and what that along with a good performance valve job can do.
If those two things are done...they will outperform home ported ground to the 45 seat 3 angle valve job stuff that's out there running high 13's. Theres a diff between 13-13.4 and 13.7-13.9..and it's in head prep.