625 street demon
dual plane summit intake power range 1500-5000
cam kit K31-218-2
87 short bed pickup 4x4
np435 4 speed, most likely gonna change to 5
long tube headers
will be a 3.55 gear
just to drive and ocassionally pull small boat/trailer.
just wanting to have a decent little running 302 up from stock.
GAWR of truck 6100LBS
I looked up the cam, and it's a Comp Cams Flat Tappet 268 High Energy. It measures 218 @ 0.050" intake and exhaust with a 110 degree lobe separation. That translates into wanting 9:1 compression, and having good midrange power. Should be a good choice for your truck.
I would not put all that effort into getting a little bit of compression. If I were going to spend money on ANYTHING at this point, it would be for a set of heads, as that's the bottleneck on small block Fords.
Since your cam is a flat tappet, I'd buy a set of these Edelbrock E-Street heads. You'll also need rocker arms and hardened pushrods.
Since the heads come with springs and all, you could save a little money by just buying the cam and lifters instead of the entire cam kit.
This being said... Your truck is a 1987. Are you certain the engine has a flat tappet vs. hydraulic roller?