Blown 360
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Junior User
Joined: Dec 2000
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Blown 360
Please help me----
Blew my 360 in my 70 f-250 4x4 w/ 4 speed.
Problem-I found a decent 390 out ot a 76 f-250 w/c-6
Is the crank in the 390 drilled for a pilot bearing?
If I decide to use the c-6 is there any problem just bolting in the unit and shorting the drive shaft? I do realize there are other things to consider like coolers and kick down. I'm just worried about tailshaft length and etc. Also is the electronic ignition on the 76 a decent setup or not? Hopefully I have provided enough info.
Thanks
Dave
Blew my 360 in my 70 f-250 4x4 w/ 4 speed.
Problem-I found a decent 390 out ot a 76 f-250 w/c-6
Is the crank in the 390 drilled for a pilot bearing?
If I decide to use the c-6 is there any problem just bolting in the unit and shorting the drive shaft? I do realize there are other things to consider like coolers and kick down. I'm just worried about tailshaft length and etc. Also is the electronic ignition on the 76 a decent setup or not? Hopefully I have provided enough info.
Thanks
Dave
Post Fiend
Joined: Feb 2000
Posts: 5,130
Likes: 8
From: Brea CA
Blown 360
Sorry Dave to hear about your truck. 360's are pretty tough, what happened?
Yes, all cranks are drilled for a pilot bearing.
I'll let the 4x4 experts tackle the C6 question.
Yes, the Duraspark is decent but I'd get everything in and running first before upgrading.
Barry
Yes, all cranks are drilled for a pilot bearing.
I'll let the 4x4 experts tackle the C6 question.
Yes, the Duraspark is decent but I'd get everything in and running first before upgrading.
Barry
Post Fiend
Joined: Jun 2003
Posts: 8,209
Likes: 12
From: Black Hills of SD
Blown 360
The only highboys that I ever saw with a factory auto had the transfer case moved back, but plenty of guys have converted to the C6. If you shorten the driveline I would reccomend using a brace like the early 77 used on the transfer case to limit the fore and aft movement of the t-case. Also you will have to fabricate a shifter mount for your tailshaft since it was part of the tailshaft of the tranny. My personal advice, keep the 4 speed if you do any fourwheeling. In granny gear and low range the truck will crawl up a tree if the bark doesn't slip, also very good for coming down steep hills.
The duraspark is a good set up once you get it all wired in. I have converted a couple of my own trucks and after getting it installed was happy. Plus side is you can find cheap or free parts. Don't forget to run a wire from the ign. on the starter relay to the switch side of the coil. I failed to do this on my first conversion and had hard starting problems in the cold weather since the wire from the switch is a resistance and you need full 12 volts to the coil for cold startup.
The duraspark is a good set up once you get it all wired in. I have converted a couple of my own trucks and after getting it installed was happy. Plus side is you can find cheap or free parts. Don't forget to run a wire from the ign. on the starter relay to the switch side of the coil. I failed to do this on my first conversion and had hard starting problems in the cold weather since the wire from the switch is a resistance and you need full 12 volts to the coil for cold startup.
Last edited by willowbilly3; Jul 18, 2003 at 04:33 AM.
Elder User
Joined: Jan 2003
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From: at my house
Blown 360
Daveo
Around 77 the 4x4 250's had a tailhousing on the C6 with a bolt hole to mount your 4x4 shifter. You have to shorten the rod but their out there and fit perfect. Got one on my crewcab now. if you can find one you won't have to fab up anything. i have pics if you need some.
Around 77 the 4x4 250's had a tailhousing on the C6 with a bolt hole to mount your 4x4 shifter. You have to shorten the rod but their out there and fit perfect. Got one on my crewcab now. if you can find one you won't have to fab up anything. i have pics if you need some.
