66gt350
Active Member
"tarafied1" said:I've heard that but never tried it. I guess I might on my build. My 94 Cobra short block has an E303 roller cam which everyone says is too mild so I may be swapping in something a bit more radical and keep the lifters. What specs are you using on the Clay Smith cam?
I'm not sure which cam I'm gonna go with. I've talked with George at Clay Smith a couple of times. I'm not gonna go too much more radical than the ford cam. I just want to get away from the e303 and the dreaded idle surge, even though I've got most of that tuned out.
"tarafied1" said:The retro lifters are over $400. They have an H bar to keep the lifters from rotating.
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With those retro fit lifters, do you need to run a small base circle cam? I think I heard that somewhere, but I don't recall.
"Sluggo" said:Sort of.
An early 302 has a different firing order. A later 5.0 and all 351 windsors have the same firing order. You can use a cam for an older 302 but must use that firing order. I don't recommend it however.
Normal 5.0 motors have the older style firing order, it's the HO motors that have the different firing order. but most cams that manufacturers grind have the HO firing order.
289 1-5-4-2-6-3-7-8
302 (Pre-82) 1-5-4-2-6-3-7-8
5.0 1-5-4-2-6-3-7-8
5.0 HO 1-3-7-2-6-5-4-8
5.0 Truck 1-5-4-2-6-3-7-8
351 1-3-7-2-6-5-4-8
Over the years, I've run both firing orders in my car. I've never had any issues with either one.