Originally Posted by oldandtired
In a traditional 184346572, you have three same crank BTB pin fireing
(4-3, 6-5, 2-1)
In a 4/7 swap 18736542 you only have two (8-7, 6-5)
In a double 7/4 - 2/3 you go back to three same pin BTB fireing.
Are the double swaps proven to be any better?
My cam is custom ground for my motor, and it runs damn nice!!!!!!