Best bang for the buck?

converter.... and make sure it hooks up!
Give us more detail. Post a ET slip? Headers? Dual exhaust? What carb/intake? And tune what you have now, should go faster than 15.02 with 3.55's, cam, 4bbl.
P.S. - almost no money and considering eddy heads???
Stock bottom end 318. J heads 1.88 600 eddy carb dual plane performer intake 340manifolds dual exhaust 727 trans and i am pretty sure the 145 k 1900-2100 stall converter.Rear end is 8 3/4 sure grip with super stock springs