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Old Mar 25, 2006 | 08:22 PM
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From: KC
small block adaptor

Im looking to swap out my 223 and am wanting to find something that is compatible to highway driving and longer trips. Ive done some research and found a sb tranny adaptor for Y blocks ($695). My question is what kind of mpg could I expect in a 63 shortbed with 3.25 gears and a T5 or AOD tranny and a stock Y block (maybe headers?). Am I dreaming If I wanted 17 or 18 on the highway. I would love to be able to cruise comfortably at 75, after rebuilding athe front end of course. Any thoughts would help.

Thanks,
Nick
 
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Old Mar 25, 2006 | 10:14 PM
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I have a 56 with a 272 Yblock I changed the gears in the dana 44 from a 3.73 to a 2.72. I got 20+ MPG @ 70 mph on the highway. Its very doggy from the start but out on the road it'll run 80mph no problem. I'm using the stock 3 on the tree trans

Kevin Bigwin
 
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Old Mar 26, 2006 | 08:46 AM
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21 Mpg

I have a 56 Victoria w/ 3.73 gears and a T-5 w/ .67:1 overdrive. Highway mileage (300-350 mile round trip) is 21 with the AC on.

TC
 
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Old Mar 26, 2006 | 11:23 AM
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Nick,

If you want a T-5, this might be a little cheaper route than the Bendtsen adapter: http://www.ford-y-block.com/truckt5.htm

You will need to get a Y-block manual bell, as the 223 bell won't fit a Y to my memory. I don't have one here to check though.

The AOD will work using the Bendtsen adapter, which is what I guess you're looking at. Keep in mind this swap has a lot of hidden costs, so add up before you start.

I think 17-18 is easily doable. I got 14-15 mpg on the Interstate with 4.27 gears at 65 (uh, or thereabouts. )
 
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Old Mar 26, 2006 | 08:29 PM
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From: KC
thanks for the encouraging news guys. I like the t5 better than the AOD. Thanks for the link to the y-block site lots of good info there. Now I just gotta start keeping an eye out for a good 292.

Rock, how much effort was involved in installing a hydraulic clutch for the T5?

by the way homespun your sig line is priceless.
 
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Old Mar 27, 2006 | 05:48 PM
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McLeod used to make a hydraulic throwout setup for the T5 that was pretty easy to configure; I haven't looked lately to see if it's still available, but probably so.

Actually, the signature pretty well applies to anything in life that needs fixing- nothing like fixing one broken plumbing fitting, & ten hours later, you've re-plumbed 95% of the house, & the other 5% is getting done right after the kids go to bed.
 
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Old Mar 27, 2006 | 11:01 PM
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T-5

No hydraulic clutch on the Vicky. It was already a standard tranny car and used the same linkage. It does require a different clutch disc tho. 10" to fit the T-5 shaft on the car. I think truck clutches are 11". Saw a bellhousing for a truck on ebay. Also a 292 truck engine. Depends on where you are located if it could be worth the $.

TC
 
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Old Mar 29, 2006 | 07:45 PM
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The original 239 in my 54 F350 with 5.14 gears got 11 mpg on the highway at 55 and 11.5 around town.

The warm 292 was anywhere from 6 to 13 with the same rear but I was "trying out" the three 94's most of the time! A Dana 60 with 3.54's going in soon.
 
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