i would change the cam because it just aint right!! I would use a 2/3 4/7 swap cam with 108 Ic/l 112 lob sep 625 i lift with a 1.6 rocker adding .040 to that number the 656 exhaust and 1.5 rocker on that have the duration at 284 int 282ex I would give that a look good luck with your motor joe g 8)

ive been racin and buildin cars for 40 yrs and i still cant see how in the hell a 4/7 firing order is going to improve anything. things look good on paper but ive not seen any proof.

Outlaw i agree but there is one thing it dose help is crossfire as 5/7 fire wright after each other and the 4/7 separates the two. I have heard some say that there is power to be gained with 2/3 4/7 swap but dont know about just 4/7.

The 4/7 swap is to help with fuel air seperation for #2 cyl. When the car is moving forward and everything in the intake is going to the left rear for 5&7 then has to change and go to the right front.It does seperate 5&7 firing but it puts 2&4 together.I don't know if any one will get anything from the way I said that or not.Bill.

Sometimes my dad would call me simple.Bill.

DD chevys rule and mopars drule and fords are just another product of mopars so whats left :lol: :lol: :lol: :lol:

Well, I AM a member of the Old Droolers Car Club of Emmett,Idaho..... 8) 8) 8) "We be coolin' and droolin'"

well boys ive been a sbc fan my whole life. built some really bad ass engines. but a few yrs ago i got to really reading up on facts about the chevys ford mopar cars of the 60s and 70s. quess what i now own 19 engines and almost all are big block fords. 429, 460s with a few 390s for fun. and a extra 352 just in case myy dd goes south.as far as hp goes chevy didnt even get close to what mopar was doing. and ford was right there in the front also. i still love my chevys but i gotta give credit where its due and the other 2 are really the ones up front. just not as popular.

That is very true and was just having some fun with DD. I was surprised when roadkill posted about 302 boss heads i had forgot all about the left and right.