Just wandering if long headers will fit on a 94 4x4, 302 with no issues, and what is the advantage if any on running short headers. Thanks.

 

They won't be a direct bolt in, you'll have to modify the exhaust.
Most exhaust shops will tell you shorties are "manifolds made of pipe" so there isn't much gain other than a little more top end power.

 

Exhaust won't be an issue, for some reason I thought there were clearance issues but wasn't sure.

 

Depending on the manufacturer you may have to move the brake proportioning block in the frame

 

I've heard that saying before but if you look at short headers next to a cast iron manifold you will see how silly it is. Oem manifold for this truck are useless for performance. It's a hunk of iron. One tube fed by smaller tubes. They are quite small and make 2 immediate 90* turns. Short headers do their best work at mid range to high rpm. Making them well suited for high reving cars or cruising at freeway speeds. They don't pick up low rpm torque as well as long tubes but increase scavenging velocity due to a relatively smoother flow. They are also made of larger tube to allow for more volume than oem Thinner steel helps draw heat from the heads and dissipate faster. Longer tubes than oem and collector design provide for better cylinder separation and resists draw back or cross pressure ( where the gases coming from one cylinder try to go into another open cylinder creating backpressure). They are also smog legal where that is a concern and fit the stock y pipe. They make the exhaust louder and deeper as well over stock. So the long tube may be the better performer in a truck but the short tube is much better than oem. I ran them along with a 3" after cat single tube upgrade and got a definite boost in pickup and passing as well as a good 2 mpg. They bolted in easily. Only mods were to the oil dipstick mount and the upper intake brace. They don't fit on the screws so you have to cut them to fit.

 

Yea by design alone you can tell the shorties will be better than oem, but that's just what most people will tell you.
There's gains but not by much.

 

Honestly the biggest gain in my opinion was that they didn't break into 3 separate pieces on the engine like the oem. That was well worth the $125 I dropped on them. Besides I can't run long tubes in California.

 

That's true there, I forgot you was under emission testing.

 

Our trucks don't have a proportioning block. They have one valve screwed to the master cylinder.

 

You're right, I should've said junction block