has anyone hear put a set of headers on a 390 in an f100/f150 73-79?

I will in about a month, and my set is different than any set ive ever seen. On the pass. side the front two pipes go in front, down and around the engine mount, and the back two look to somehow bend around the starter and head down to the collector. the drivers side don't look bad, just don't know what will have to be taken off periodically to get the header in.

Just wondering how easily/hard they go in and any tips for installation. The manifold bolts are all loose (as in none will snap. i can get them off no problem). so thats out of the picture thank God.

And do headers really wake up this engine?

 

I can't say much about them in a f100/150 but headers really do make a pretty big gain. The most restrictive thing on these is the exhaust manifolds.

 

Don't know how much of a difference there is but on my 70 F350 just had to lift the left side a few inches & they went in just fine, right side came down from the top, I have a C6 trans & had to smash the pipe in so the shift lever didn't rest on the exhaust

 

yea here are some pictures:







and i don't use left and right so which side are you talking about when you say left?
My tranny is a t18

 

As sitting in drivers seat, Left Driver side, Right Passenger side, To many years working on Aircraft I guess

 

well the pass side splits in two, after you cut the rest of the flange where the pre-cut is. and it supposedly fits around the pedestal or whatever you call it that the mount bolts to. i don't mind if i have to grind some of it away, but the starter seems to maybe be in the way. i'll find out i guess lol

 

What brand headers are those? I wouldn't cut that flange as your probably gunna have to lift that side up as well.. The starter is a tight fit, even with a mini starter it can be a real pain, as you'll find out soon enough.. A bit of a juggling trick to it.. Re-Build the starter or go with a mini-starter when it's out and use heat wrap on it as it will sit real close to the pipes... do a search a read some previous threads on the subject...

 

my dads truck has a 360 with headers similar to that. my uncle put them on and he had to jack the motor up a few inches to put them in. but it clears the starter fine, it is a little close tho.

 

I used headers just like those in my highboy. The passenger side came apart so you could install them without removing the motor mount pedestal or even jacking the motor up to clear the flange. They did clear the starter, and it took some moving it around, but I could replace the starter without removing the header.

I think, if you pull the starter, disconnect the passenger-side motor mount, and jack the engine up as far as you can go, you can install that header from the bottom by sneaking the header flange between the block and the pedestal. Removing the motor mount from the engine might help too.

 

flowtech. you cut the flange the rest of the way, and slip it apart, as the two tubes for the front half slide out of the collector (notice the line in the picture). the instructions say to install the rear first, and then the front.

 

yea i just look in the and think it will be a tight fit. Can't tell until i get them in though, but i hope you word is good and they fit in my truck too.

 

i'll try and install it without jacking up the engine, but if i have to i will. How easy is the drivers side? i have a t18 so theres some stuff there and i don't know if i have to take anything off temporary for installation.

 

I put Headers on my 1973 F100 390

Tight fit..makes changing the starter a Bear....
Use a Starter heat sheild
Better fuel economy and torque
Worth the swap
1952

 

was yours a 4x4?

 

I posted a new thread in the 73-79 section. Got the headers in last week and they went on easy as hell. One of the easiest things i've ever done.