Originally Posted By cudadoug
Originally Posted By AndyF
I'm running both 240 and 270 heads right out of the box on my 470 engines. 700+ hp from each engine without any issues. I have about 90 pulls on the 240 heads, 30 pulls on the 270 heads.


With the as supplied springs??


That's what I was wondering......


63 Plymouth savoy
65 d100
66 dart race project
58 plymouth suburban