390 vs. 5.0 HO weight difference?
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390 vs. 5.0 HO weight difference?
Hey all, I'm thinking of swapping a 5.0 HO with an AOD into my '76 F350 instead of the 390 with a 4 speed manual, and I'm wondering what the weight difference would be between the two?
Here is a pic of the 5.0 I plan to use... http://i44.photobucket.com/albums/f2...7-22-05011.jpg
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Here is a pic of the 5.0 I plan to use... http://i44.photobucket.com/albums/f2...7-22-05011.jpg
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Originally Posted by 85e150six4mtod
Approx 200lbs, possibly as much as 300.
Originally Posted by pops_91710
That 390 is an excellent heavy-duty work engine. Why the swap??
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Last edited by 460; Sep 30, 2007 at 06:45 PM.
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You may need to beef up the AOD.
Go here and put in your gears and tire sizes etc. See if you will keep that 302 in the right rpm range to pull the load. I've been in E150s with 302s and they did ok with some towing, but those probably had a little different cam than yours.
This will be a lot of work for whatever mpg increase you see. You can put an OD on your 390 for somewhere between $1500+ to $3000 depending on model.
http://www.high-impact.net/transmiss...roverdrive.htm
http://www.gearvendors.com/
A tuned up 390 with the OD will be on the road much sooner than your 302 swap....(imo, your mileage may vary)
Go here and put in your gears and tire sizes etc. See if you will keep that 302 in the right rpm range to pull the load. I've been in E150s with 302s and they did ok with some towing, but those probably had a little different cam than yours.
This will be a lot of work for whatever mpg increase you see. You can put an OD on your 390 for somewhere between $1500+ to $3000 depending on model.
http://www.high-impact.net/transmiss...roverdrive.htm
http://www.gearvendors.com/
A tuned up 390 with the OD will be on the road much sooner than your 302 swap....(imo, your mileage may vary)
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Originally Posted by 460
The factory ratings on the engine (if I remember correctly) are 275 hp and 300 torque.
Thanks everyone for the input.
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Laughing Gas
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From: Chino, California
Originally Posted by dragogt
you'd be better off keeping the 390, it wont have to work as hard as the 302, to pull the weight of the truck and loads. Making fuel mileage equal or worse than the 390 jmho
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Laughing Gas
Joined: Jun 2003
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From: Chino, California
Originally Posted by dragogt
right, I didn't mean to say the 390 was a gas hog, Just that the 302 would have to work twice as hard to do the work of that 390. And that mpg would be better with the 390 vs the 302.
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