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1981 F100 Columbus GA

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Chopperdriver
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Joined: Thu Nov 28, 2019 4:57 pm

1981 F100 Columbus GA

Post #1 by Chopperdriver » Fri Nov 29, 2019 5:12 am

Purchased a 1981 F100 300 4.9 with a three on the tree. Nice solid old truck, but the head gasket gave up after 38 years. Thought I would do the job myself. Head is off at the machine shop. Replacing most of the old parts with some upgrades. Purchased the Jegs kit with the 4bbl intake, headers and Holly 390 to put back on. Everything came apart pretty well, looking forward to this site for help with the reassembly process.

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wsa111
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Re: 1981 F100 Columbus GA

Post #2 by wsa111 » Fri Nov 29, 2019 2:18 pm

Welcome aboard. Sounds like you have the bull by the horns concerning your engine.
There is a lot of info in the big six tech section & big six performance area of the forum Bill
67 mustang,C-4, with mod. 80 hd, custom 500 cfm carb with annular boosters, hooker headers, dual exh.-X pipe, flowmaster mufflers, DSII dist. MSD-6al & MSD-Blaster 8252 Coil. Engine 205" .030" over with offset ground crank & 1.65 roller rockers. 9.5 comp., Isky 262 cam.
2003 Ford Lightning daily driver. Recurving Distributors. billythedistributorman@live.com
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bubba22349
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Location: Flagstaff, Az. 86005 near the old Route 66

Re: 1981 F100 Columbus GA

Post #3 by bubba22349 » Fri Nov 29, 2019 5:02 pm

A big welcome to the Ford Six forums sounds like you are well on the way to having a nice pickup. Good luck on the up grades :thumbup: :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

Jimmys61falcon
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Re: 1981 F100 Columbus GA

Post #4 by Jimmys61falcon » Tue Dec 24, 2019 8:10 pm

Hello neighbor! I just moved to Warm Springs, GA and loving it!

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wsa111
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Re: 1981 F100 Columbus GA

Post #5 by wsa111 » Tue Dec 24, 2019 11:00 pm

Welcome aboard. Cruise the forum & enjoy the knowledge. Bill
67 mustang,C-4, with mod. 80 hd, custom 500 cfm carb with annular boosters, hooker headers, dual exh.-X pipe, flowmaster mufflers, DSII dist. MSD-6al & MSD-Blaster 8252 Coil. Engine 205" .030" over with offset ground crank & 1.65 roller rockers. 9.5 comp., Isky 262 cam.
2003 Ford Lightning daily driver. Recurving Distributors. billythedistributorman@live.com
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bubba22349
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Posts: 9301
Joined: Sun Jan 03, 2010 4:46 pm
Location: Flagstaff, Az. 86005 near the old Route 66

Re: 1981 F100 Columbus GA

Post #6 by bubba22349 » Wed Dec 25, 2019 3:41 pm

:beer: welcome to the Ford Six forums in my opinion it's the best inline six site. :thumbup: :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

65 F-100 pete
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Re: 1981 F100 Columbus GA

Post #7 by 65 F-100 pete » Thu Dec 26, 2019 9:34 pm

I have a 240 ci engine in my '65 F-100. I recently got rid of the stock exh mnfld. I put on cast iron headers on it. What a difference that has made ! Here in mountanious N. Carolina, I used to slow way down going up the long steep inclines. Not now. I have the same 1V carb, same distributor, oil bath air filter.
Bet you will like your new set up too. Oh, nearly forgot to mention...I made out of a 1"thick piece of solid aluminum...an exchanger. I drilled a hole straight thru ( the size req'd for 3/8 NPT ). I then tapped each side so I could put a 3/8 nipple in the alum. Then the 90 deg. elbows pointing towards the pass. fender. ( the hole in the alum. goes parallel to the 6 cylinders ). I put the hole in the center.
The shape of the alum. block is the same as the opening where the mnflds. were together. Don't make the block much bigger than this opening, just big enough for the three bolt holes, maybe 1/4" past the edge of the holes. I say that because... I found out that there is barely room to get the header in its place with the alum. block on first. So, put the header on first...then the alum.
I put the heater hose that comes from the thermostat housing to the alum. block. Then the cowl side of the alum. block heater hose goes to the heater core. Whew!
Also need to mention...the nipples coming out of the alum. block were 1-1/2" long. No longer. I had to take the 3/8"x 6" extension off the ratchet to tighten the mnfld bolts behind the alum. block. Used a deep well socket.
Hope this helps. Happy new year, Pete

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