hello guys, i sold the comet, sold the torino because of lots and lots of rust, and i gave the camaro to my brother for his 21st birthday. and now i have a 64 chevy stepside. i plan on a cheap restoration this spring. this truck will be my daily driver so i want a little power and some sort of fuel efficiency. heres what i got in mind.

goodwrench 350, 260 horse with a better cam, im thinkin about a comp 268h high energy,performer eps intake, 600holley, 1 5/8 headers, stock hei

rebuilt turbo 350 with a manual/automatic valve body, cool floor shifter

3.23 gears, 255/60/15 rear tires, 245/60 front

i want duel 40 flows with x pipe. i know that 2 1/4 inch pipe is plenty, but i may put more engine in it down the road and i am wondering, if i get two and a half, will torque suffer?
feel free to comment on my other ideas too