a 318 with a good BBD 2-v,stock 360 4-v cam, stock high stall TC,headers/duels with that 2.76 gear would help it.

I am getting 18+ with a JY-91 #302 headed 318, whiplash roller cam,Holley street dominator intake,6210 Holley spredbore 650cfm,headers/2.5" - 2 chamber muffs/duels out the side, NV4500 5-speed, 8 1/4-3.21 gear turning 235/75/15.

cam sweet spot is 1800 rpm, 55mph is 1500-1600 rpm.

great street/cruzer cam.

try swaping on a set of #302 heads on the 360 to get some torque down low to help the 2.76 gear. add a holley street dominator with a q-jet/spredbore Holley.

not a high reving race engine but does make a nice stump puller in a stockish daily driver work truck.

just bumping the axle to a 3.21 - 3.55 gear is gonna help get it rolling.. IMHO, thats where it is sucking the gas, getting it rolling with a 2.76 needs a heavy throttle.