tomorrow I'm going to measure the framerail distances and see about the exhaust. The manifolds on the 427 are pretty tight to the block and seem as though they would have decent flow. They have tons of space on the truck its in, but mine could be a different story. Right now I have hedders on my 350 and I have plenty of room, well, its not tight. Really would like to make it work. Truck is strictly for torque, so this block would be better than the non industrial blocks. I could be overbored and cammed up good right?