318 2bbl manifold swap with OE cam - worth it?

I wouldn't run a Holley 650 and no way would I run a Holley 650DP, even if you plan a build up in the future.

(Get the carb you need for your future build when you know for sure what you are building)

Both are over kill and the DP would simply suck *** on there.

My old 318 responded well to a 650 dp, if I recall correctly it picked up about 3 tenths. The only reason I would recommend the dp is its easy to upgrade when you start making more power (with a proform main body swap you can have a 750 dp). I agree, if you have future plans for a bigger motor, just wait and save your money.