Will a 1F intake/exhaust fit a 2F? (1 Viewer)

[jikser]

Does anyone know if an intake/exhaust from a 71 1F will fit a 75 2F? I think I've found a 2F to replace my 1F but it needs an exhaust manifold. Wondering if mine would work.

Thanks
Les

 

[74fj40]

i think so, but not positive

 

[clemson55]

I'm going to disagree and say no they will not, however I think I have at least 1 intake exhaust manifold combo for a 2f if your interested.

 

[SpaceGhost]

68 and later will fit the head, gotta clean up the holes for the larger bolts to fit. The intake won't match your exhaust, so you need both pieces.

 

[FJ40Jim]

Does anyone know if an intake/exhaust from a 71 1F will fit a 75 2F? I think I've found a 2F to replace my 1F but it needs an exhaust manifold. Wondering if mine would work.

Sort of. The 68-74 F manifolds will bolt onto the 75-87 2F head, if the 6 big boltholes are drilled out to 12mm. It sounds easy, but because of the fact it's not a solid hole, but is made of 1/2 iron exh manifold and 1/2 aluminum intake manifold, the drill tends to catch,chatter and chip.

I have also heard people say that "stepped studs" that are threaded small for the F manifolds and large for the 2F head could be used. I have never seen these studs, so am not certain of their existence.

 

[Poser]

SOR at one time sold them...


I have used them.


044-02X is the part number on the bag that I have in front of me containing said stud...



Good luck!


-Steve

 

[jikser]

I would move my 1f stuff over as a set, don't want to separate them and go through the whole machining bit. Sounds like the stepped down stud might be the only option since I won't be drilling my manifolds either. Other than the oiling issue any other reason I would want to go through all this. Either way I will be rebuilding eventually wheather it's a 1F or 2F. The 75 isn't an odball motor year or anything is it? My 1F has lasted 30 years after all even with the oiling bypass.

Thanks for the help
Les

 

[Poser]

Been using stepdown studs on my 1982 2F in the red truck since 1996, and have installed them in a half-dozen other trucks over the years...no biggie. Just remember your tourque value is for the smaller fastener, ( F ) engine, NOT the 2F!


' the oiling issue' would not be a reason that I would remove a running engine, to replace it with something ' better '... If it works, don't mess with it.... I think that is rule #1....could be wrong though..


If you are going to build an engine for eventual replacement, there is nothing 'oddball' about a 75 2F.


Good luck!


-Steve

 

[jikser]

Pretty much want to build one for eventual replacement. I know I have at least one cylinder with a lot less compression than the others, pretty sure the PO ran the brake booster long after it was shot. Still runs good and doesn't smoke, so I have plenty of time to get one built. Just checked SOR still carries the studs, only $2.02 as well. Thanks for the advice folks.

Les

 

[FJ40Jim]

SOR at one time sold them...
I have used them.
044-02X is the part number on the bag that I have in front of me containing said stud...
Good luck!
-Steve

Cool, I learned a new part number today.
Thanks Steve!