Had a 360 with x heads bored 30 over purple cam, in a 73 cuda. Had a formula s 69 340 same thing x heads 30 over purple cam same, set up as the cuda.I found the rev's
were quicker on the 340 to to 360. I had both these cars at the same time. So it was easy to tell the difference. So before you all go there gearing ect. I said same set up. I have always found the 340 to get the rev's up quicker. PLUS the famous 1970 340