standard or reverse firing order

I have a 79 ski tique and was thinking about putting a 347 in place of the 302, but I'm really not sure about the firing order. I am a chevy guy and this is my first ford.

The transmission and prop to think about if you're going to change rotation. Firing order depends on cam shaft.

That's right, but I was refering to going from RH to LH (motor swap). If you're going to change a LH to RH in the engine, don't forget the rear seal too.

8122pbrainard wrote: TRBenj wrote: Pete, I believe the correct firing order would be 1-8-4-5-6-2-7-3 on that 302. If the motor currently runs, you can tell for sure by looking at the dist and plug wires. Tim, Did I make a typo? What was I looking at in the manual in our ref. section? The one I got the firing order out of is the second one in the list and not the first one that I linked above.

Pete, there are a few firing orders listed for the RH 302 in the PCM manual. The one you listed *might* be the 289/early 302 firing order. Later 302's used the 351w firing order. Reid would know more about which engines used what, and when the switch was made.

My LH 351 in my '90 uses 13726548, and the RH 302 in my '78 is 18456273.

79,
I thought it has already been discussed that the 1:1 tranny can go either direction. Thus being the internals need to be changed around, for proper rotation.

Tim,
I got you now, I was not thinking along that line. I was stuck thinking Chris ment that you could not do it.

My 302 was originaly 18736245.The cam card from my new in '88 Crane cam said 18736245,but was in fact was 18456273 which I believe is 351 order.

Tim777,
I with you on the 347! Call this guy at the link below and you can have a RH (reverse rotation) short block delivered to your doorstep for $2K, shipping included. Then you can re-use ALL of your marine parts and pieces. You will need to provide the cam and other normal items for a long block rebuild. I've gotten several from him, Paul Anthony, and he's a great guy to deal with.    http://www.pareraceengines.com/home.html

And your firing order will stay the same at the 18456273, as Tim Benj mentioned. This is the 351 firing order which 302 4V engines began utilizing when they started sharing the same cam and 351 heads back in about '71. As someone else might have mentioned many of the lower hp 2V versions still used the old 289-302 F.O.

Stroke it 777. Oh, meant to add, you may need to buy a new/higher pitch prop, as the additional cubes may have you turning the orig prop a little high. Nice problem to have though.