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Old 09-12-2012, 07:11 PM   #1
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Ford 460 to 6.8

1) Is it possible to put a new 6.8 v-10 with a Torque-Shift tranny into an pre 1999 model Class A that currently has a 460 v-8?
2) If not, will a new 6.8 (3 valve) and Torque-Shift tranny swap into place with an older 6.8 (2 valve)?

Lately I have seen a couple of older Pace Arrows that are still in pretty good condition, but I know that they are way under powered.

Will the Banks Power upgrade for the original 6.8 make it preform similar to the newer 3 valve engine?
Charles & Regina Nichols & Maggie Mae
2008 Ford F-250 CC 5.4L 3.73
2010 Crossroads Cruiser 30SKP
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Old 09-12-2012, 07:47 PM   #2
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Chazworth, I am pretty new to all of this, my experience is limited to leasing a few RV's over the years but I can tell you this. I have a 1996 32' pace arrow with a 460 in it, it has under 15K on it. Power is really not a problem, hills with a trailer (8'X12' with 2 motorcycles and related gear) typically no problem. Granted it pulls it down some, but under ordinary curcumstances it will move on down the road at 70 pretty easily. I typically set the cruise at 62 and it rewards me with 8ish MPG. I would imagine the new motors being more efficient (power and economy) but hardly worth the associated headache I would imagine?
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Old 09-12-2012, 07:59 PM   #3
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We put a Banks kit on a '98 460, made a huge difference in power but nowhere near to being enough as far as I was concerned. No measurable difference in fuel mileage either so it didn't get a bunch worse!
I don't think changing the engine/trans would be worth it unless they were already bad and even then the cost of having it done might be prohibitive. If you can do the work yourself and get a "donor" vehicle cheap then maybe it'd be worth it.
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Old 09-12-2012, 08:45 PM   #4
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Any engine swap is possible in the auto world...but is it worth it?

I know a guy with a GM Crate 502BigBlock in an old GMC front wheel drive RV - Very Cool!

Besides the change of all the mounts (requires a metal fab project), the newer engine/tranny sets are fully computer controlled, so would need the entire electrical loom from a donor vehicle - and - the fuel delivery system has to be changed for the high pressure injection system (often a loop system that has a high pressure return line). The gearing in the axle might need to be changed too (depending on the original ratio).

It is generally accepted that an engine swap from old tech (carb) to new tech (Fuel Injection) would cost starting at 4 times the cost of a rebuild of the original motor.

Upgrading the original motor and tranny with heavy duty parts, plus adding a Gear Vendor over/under-drive is often less expensive and easier for a DIY type owner.
Gear Vendors under/overdrive transmissions the most awarded auxiliary transmissions.

And finally with RV's, the cost of doing an engine/tranny swap often makes upgrading to a "new-to-you" gently owned unit a better deal.

Hope that helps.
Kim and Steve, Mustang LCDR (USCG Ret), Outlaw #1193
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Old 09-13-2012, 04:53 PM   #5
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I think trading for a coach with a later model chassis is a better option since you get the motor and transmission already (I think the transmission is supposed to have another gear vs the one for the 460) and heavier duty axles and wheels, possibly better fuel mileage. My coach is 32ft 460, seems to have plenty of power but the 16" tires are right on the verge of being overloaded, I figure the axles are as well
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