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Not in the stock location, but March, MSD and many other companies make kits for mounting alternators. You'd probably have to use a one wire with these and then play around until you found the right belt length.
Why can't you use a single high output alt? I have one that goes to 230A (nearly twice the output of the stock alt) made by HO Alternators. There is another thread in forum about a different manufacturer and I think they went up to 250A.
...also not a dual set-up, and I chose a more modest power level.
But check out the pictures and the links, there is a lot of information
that is good to know and may help you make the best decision for you.
2005 EXCURSION LIMITED-options (everything) equipped Eddie Bauer edition 4X4 PSD
4" FabTech lift/level, Bilstein $$ mono-gas shocks, Rancho Steering Stabilizer
Silverstar 9005 fog and H13ST headlights + wiring mod to run high beam and fogs together,
BFG 315/75/16 AT KO's on Factory Mags, 22" front and 18" rear rain-x wipers, Auto
-zone aftermarket voltage gauge, LANDYOT Generation II Radius Rods, EBC green brake pads,
Custom 140 amp surge-proof low RPM alternator, matched Duralast 1K CCA batteries
Ford factory hood insulator, Mojave Pin-Striping
here....... Home page Its where i got mine. dual 175 amp alts. they can do dual 250 amp alts if you want. with this setup, you MUST have dual batteries because the main alt runs the truck and the second alt will run the other system like the my stereo. they will, and have already been measured at 216 amps when cold and will do it hot too. sorry for the big pics.... the first pic shows the stereo drawing 164 amps by itself and the top volt gauge monitoring that battery at 13.9 volts and the main alt is also at 13.9 volts.
RacerX what brand of gauges are those? is the Ammeter using an inductive pickup? I like the look of those gauges and need to get some for my truck soon too
southpaw, they are the autometer cobalt gauges. the ammeter comes with the pickup. yes, it is inductive. i ran my 2/0 power wire through it. that gauge alone was about $200.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.