finally it looks like V-8 time

dude, you scored on that intake, nice and flat, but it doesnt perform real well. Get yourself a Edel Performer they are almost as flat and are a modern dual plane, way more torque down low but youll need to grinid the holes a tad so the bolts will line up. Not real hard. An LD4B is similar to the Performer but has a little more port volume. Are your heads closed chambers? If you have 4 valve relief pistons, get yourself some 302 casting number heads from a later 318, much better breathing, closed chamber for a little more compression and a better combustion chamber shape for better performance. Remember to check for a dowel pin in the front part of the block if switching manifolds. I cracked my original intake becasue the new 318 block had a pin and the 273 intake didnt have a hole! Dump the FI, too much hassle unless you live in the cold north and like a car that starts easily in the morning, and that is not too hard wiht a good chokle on a carb. I looked into it and it just didnt add up. REturn line, external FI pump, ECU, sensors, weak intake designs, limited HP limits on that 2bbl version and injector prices. Those 2 injectors are about 180 to upgrade or replace. Nope, a stock sized Carter 500CFM or an 1850 Holley, even one of those weird Aluminum Holley spreadbores that are rated at ~500CFM would work well.