Bob: I think I'd leave the rear end alone. You might get a slight gain in
mileage, but I don't think enough to justify the cost of swapping gears. I
also don't think duals have any measurable effect on engine braking, and as
far as that's concerned, you can route them any way you like. Personally, I
don't like the racket of pipes that end that far forward.
Dan
> From: Bob Kiger <[EMAIL PROTECTED]>
> Reply-To: [EMAIL PROTECTED]
> Date: Wed, 13 Jun 2001 10:22:49 -0700
> To: Multiple recipients of VACList <[EMAIL PROTECTED]>
> Subject: [VAC] Vintage Puller
>
> I am getting ready to show my "new" 66 Ford F-250 "Camper Special" via
> pictures on my web site but first I have a few questions for the old pros on
> the list.
> The truck has a 4:10 rear end. It has enormous low end pick up and cruises
> at 75mph. Is this the optimal rear end or should I move to something a bit
> higher like a 3:90 to pull my 66 Safari? Gas mileage is currently 10 mpg
> without towing :(
> Second question is the role of exhaust in braking the vehicle. I have
> heard that dual exhaust that are very efficient may be problematic when it
> comes to slowing down. Is there truth to this?
> Lastly, there is a lot of stuff preventing exhaust pipes from making it to
> the rear of the rear wheels. (e.g. 2 auxiliary gas tanks) I am thinking
> of just using a right angle exhaust tip about three feet behind the
> mufflers. Will that further exacerbate the back pressure issue if there
> is one?
> Bob
>
>
> 1966 Airstream "Safari" WBCCI #2857
> 1966 Ford F-250 "Camper Special"
> Mira Mar Mobile Community
> Oceanside, California
>
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