Hello,
I was just wondering if anyone has ever done any kind of performance upgrade to box your frame on a 87-91 F150 C-Channel frame?

I know these are real prone to flexing, since I have a 1991 F150 4x4, with 302 5spd.

Would it be a good call to get it professional done, or attempt it myself?
I don't think it would be that hard no? Since you would just be increasing the rigidity of the frame, for safety as well?


TONY

 

gotta relocate fuel filter and lines unless you plan on them never needing to be replaced

 

Of course,

 

But seriously, did any muscle car/truck people try this conversion?

Or even think of doing something like that?

TONY Z.
#40

 

If you are a good welder and think that you can do it, sure.

It would be hard in that to do it right, it would be best to take the truck down to the bare frame to make sure that it's not flexed already (for starters, wouldnt want to box a flexed frame) Also, the fuel lines and wiring would be best removed, and then you will hae easy access to the frame. I can't see it being worth it to try and do it with the body and stuff on, there's not enough room to do it right.

Yes it would be increasing the rigidity, but you have to make sure that you are a good enough welder to get good penetration, good solid welds, and not actually weaken the frame in the process by heating it too much.

 

Very true, not to actually do more harm than good by weakening the frame.
I just always wondered if anyone has attempted this process?

I know for sure old muscle trucks like the 67-72 Chevy has seen something like this in the past...
maybe down the road, when I become rich and famous I will make a conversion for this???

I know it must be done sooner or later, since the 80-96 F150s are a dying breed, BUT they will live forever... and I predict they will be just as popular in the future, as is 67-72 Chevy trucks are today.

I can't say that about 1988-99 Chevys... they suck! Sorry bowtie fans.
Not to much in ways of performance there... compared to a nice 5.0L EFI with a decent 5spd trans in the 87-91 F150s.


But that is just my opinion.
TONY Z.
#40

 

Ah, just for the sake of the argument they can be decent little trucks. A buddy of mine down the road has a short-box, reg cab, 1500 with a 350 overbored, some headwork and a nice shift kit/cam and it's decent. Doesn't sound like my 302 but hey. :P

 

Ya I agree...
maybe I was a little harsh on the 350 TBI chevys... but like you said, they are not a 302!

TONY Z.
#40