I run a '70 340 .030 ross 10.5 flat tops. "X" heads with musle motor stage 2 port work. Ultradyne .587/255 @ .050 solid flat tappet cam, RPM air gap and a Biggs 750 Holley. MSD dist.,6a box and Blaster 2 coil. Stock crank and eagle "H" beam rods. A 4300 Coan 8 inch converter in a 727 with a...