I run a 250 with 307 flat tops.block cut .018 head cut.013. comp cams 260 H cam and kit plus their rockers push rods and gear set. I don't have lumps in my street engine but I have the bosses cut to a knife edge and some bowl work with stainless proflow valves and hardened exhaust seats. I built my own intake and am currently running a quadrajet on it(had an Edelbrock and it ran rich most of the time increased power and mileage with the Qjet. I run a med duty exhaust manifold with the 2 1/2" three bolt flange. It is installed in a 41 Plymouth 2 dr sedan and I got 20+ mpg towing my roadster on a trailer going to convention last summer with the air conditioner on. I also run a built 700r4 and a 9" ford rear with 3.50 gears and 215 75 15 radials (27" tall). It tows my roadster like it isn't even back there. I also run a complete MSD ign including distributor, blaster coil, 6A box, and wires.
