best cylinder head

it will have an all out tub job, frame rail work, 10 point cage, dana 60 with 31x16.5 dot slicks 5.38:1 gears, 4 speed with a scattershield and all that and a vertigate setup. also a cool fact about the dart is it is the number 1 dart off the line from L.A for 1969 sequence number 00001. factory radio delete car with the full trim piece on the dash and everything. turqoise with a white top

Oh god. I could see minitubs maybe, and its your car, but man, I wouldn't cut that thing up like that.

I got a 26x8.5 hoosier slicks on my stock wheelhouse dart and went 1.3x 60' times with it. You don't really need that steamroller these days.