1/2ton to 3/4ton switch

[H-DFord]

My question is this. Im thinking of putting my 69 Ranger body onto a 72 camper special frame. I'm running 3.25 rear end and got about 14mpg on trip home. I did not 3.25 on 3/4 ton trucks , so would I put my mph even lower than I'm getting now? Also,could I find a 3.25 or3.00 rearend for 3/4 ton. I know it would not pull as go but need higher mpg more. Thanks for your time and input. John

[H-DFord]

Also, im running a c-6 transmission and truck has a 360 in it.

[Redcap]

Someone will be a long shortly to correct me if I'm wrong, but the highest ratio you can easily get with a Dana 60 (3/4ton rearend) is a 3.54:1 R&P. Most likely, your mpg will suffer a bit.

[H-DFord]

Ok Thanks what i'm thinking too. Guess I could just build it as a heavy 1/2 ton. Maybe go with heavyer springs from 3/4 but use a 1/2 rearend and front spindles. Not sure i'll tackle this, as I,ve also been offered some 1/2 tons with good paperwork.

[sideoilerfe]

If you're worried about mpg's just put some larger tires on the rear. Get a dana 60 with 3.54 gears and put 35's on it. It would be a dog but it might help out the mpg's. I'd take a full floater any day!:2cents:

[basketcase0302]

H-D,

The 3.54 is the highest one I see also. Unless you went with an overdrive...
I'd stick with th 1/2" ton for mileage.

Jeff

[H-DFord]

Thanks for all the responses. The guy backed out on the 3/4 I was going to use for a chassie. But I think i'll stay 1/2ton anyway. John

[FORDification]

Keep in mind that if you try to install F250 springs on an F100, you're going to find that the bolt on each end of the leaf pack is a larger diameter on the F250, meaning you'll have to either use the F250 frame brackets or slightly enlarge the holes in the existing F100 brackets.

[H-DFord]

I was thinking of using the 3/4 ton frame as it's heavier and I need to change frame as I have no title for mine. Then was thinking i'd just put 1/2 ton rear axle and use most of springs from 3/4 and on front I'd try 3/4 coils with 1/2 spindles. But a friend may have found me a 69 that was sold to be crushed. If he can trace title, I think i'll be able to trade a dent and a chevy to make up the guys weight . Right now just alot of thinking out loud. Thanks again for all the imput and i'll let everyone know how this turns out. John

[HugYourPlumber]

Was also thinking of adding 3/4 ton springs on 1/2 ton rear. Drilling the holes out wouldnt be a problem. Wonder how much higher the rear end of truck would be. Sure would be nice to be able to tow my heavy pontoon boat to the lake with my bump.

[H-DFord]

Would love to see before and after pictures if you do it.