68 305Ev6 Manual to auto swap, 4X4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68305E · 12-23-2004, 12:02 PM

Ok fellas, I am working on a major restoration on my late brothers truck and I need some major help from guys who are experienced with these trucks. Feel free to Read the story and see restoration pics at www.jakesgeneralstore.com scroll down to 68 GMC Lost now found.

It is a 1968 GMC 3/4 ton 4x4, 305EV6 4 sp, manual steering and Brakes. I want to keep the 305EV6 motor and convert the truck to an auto and put power steering and brakes in it. I know the easy solution for the auto trans would be to dump the V6 for a more common motor but this motor in my opinion is what makes this truck so cool. Does anyone know what auto trans will bolt up to this V6 Block? I need to hook up with some V6 People. I have had one suggestion of a guy making an adapter plate, which is our plan now but I am not pleased about it.

I also want to ad power steering but I am hitting road blocks there. I am told they did have power steering in a 68 4x4. I need a stuff to convert. I have tried aftermarket and they only make kits for 69 4x4 and up and 67-68 2wd

I would appreciate anyone's help with this project. We have started to put the auto colum and auto pedals in. I just dont want to go back to the 4 spd..
Thanks
Jake
jakem@starband.net

*60apache4* · 01-03-2005, 01:57 AM

Have you tried www.6066gmctrucks.org? These guys really know their GMC V-6's. Try and find a parts truck that came with the GMC V-6 and optional turbo 400 auto tranny from about 1965 -1968; it will have the correct flexplate that you need to adapt to the auto tranny. I'm not sure about the auto trans/adapter/ t-case etc. questions...Hope this helps.

68305E · 01-03-2005, 02:05 AM

thanks, that site is a big help. the guy who sells teh adapter plate in only about 20 miles from me, small world on the world wide web.. Thanks again.
Jake

Erl · 01-04-2005, 02:20 PM

Jake,
I also own a 68 GMC 3/4 4x4 with a 305V6. I have added power steering and power brakes. The power steering is a little involved, but well worth the effort. Some 2wd 67-69 305's came with factory power steering. You need to find one used. It will have the pump mounting bracket and the 2 groove pulleys. The pump, steering box and hoses are the same as the 69-72 4x4. I have the NAPA part numbers for the steering arm. The bigest problem is modifying the frame. New mounting holes and dempling the frame. I can provide more info if needed.
Erl

68305E · 01-04-2005, 05:45 PM

I woudl appreciate any and all info/part numbers you can send to me. feel free to email me directly at jakem@starband.net Also any instructions in dimpeling the frame? Pic?

Thanks so much. and nice truck...!!

Jake

**Joesjunk** · 01-05-2005, 04:26 AM

Great story!! I hope you are saving the factory bucket seats out of that thing. Good luck with your project, your brother would be proud!!!!!

Erl · 01-05-2005, 12:03 PM

Jake,
I have a section of 4x4 frame that can be used as a pattern. I will send you the section and the part numbers. Just return it when finished. I am planning on generating a mechanical drawing of the power steering pump bracket (for Jolley's 6066 page), but it will be a couple more months. Email me your UPS address to erl@pushcorp.com
Erl

BobS · 01-05-2005, 09:16 PM

Nice truck, I can't wait to see it when it's done!

Bob

Erl · 01-06-2005, 10:26 AM

Jake,
Here are the part numbers

Power Steering belt NAPA XL 24-9550
Drag Link NAPA ES-234R
Drag Link NAPA 269-2441
Steering Coupler NAPA 269-1105

I will send the frame section today.
Erl

12-23-2004, 12:02 PM	#1
68305E Registered User Join Date: Dec 2004 Posts: 8	68 305Ev6 Manual to auto swap, 4X4 Ok fellas, I am working on a major restoration on my late brothers truck and I need some major help from guys who are experienced with these trucks. Feel free to Read the story and see restoration pics at www.jakesgeneralstore.com scroll down to 68 GMC Lost now found. It is a 1968 GMC 3/4 ton 4x4, 305EV6 4 sp, manual steering and Brakes. I want to keep the 305EV6 motor and convert the truck to an auto and put power steering and brakes in it. I know the easy solution for the auto trans would be to dump the V6 for a more common motor but this motor in my opinion is what makes this truck so cool. Does anyone know what auto trans will bolt up to this V6 Block? I need to hook up with some V6 People. I have had one suggestion of a guy making an adapter plate, which is our plan now but I am not pleased about it. I also want to ad power steering but I am hitting road blocks there. I am told they did have power steering in a 68 4x4. I need a stuff to convert. I have tried aftermarket and they only make kits for 69 4x4 and up and 67-68 2wd I would appreciate anyone's help with this project. We have started to put the auto colum and auto pedals in. I just dont want to go back to the 4 spd.. Thanks Jake jakem@starband.net

01-04-2005, 02:20 PM	#4
Erl Registered User Join Date: Mar 2002 Location: Dallas, TX Posts: 555	Jake, I also own a 68 GMC 3/4 4x4 with a 305V6. I have added power steering and power brakes. The power steering is a little involved, but well worth the effort. Some 2wd 67-69 305's came with factory power steering. You need to find one used. It will have the pump mounting bracket and the 2 groove pulleys. The pump, steering box and hoses are the same as the 69-72 4x4. I have the NAPA part numbers for the steering arm. The bigest problem is modifying the frame. New mounting holes and dempling the frame. I can provide more info if needed. Erl __________________ 1968 GMC 305 V6 3/4 4x4 Stepside 06 Corvette Daily Driver Dallas TX

01-05-2005, 04:26 AM	#6
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,709	Great story!! I hope you are saving the factory bucket seats out of that thing. Good luck with your project, your brother would be proud!!!!! __________________ 72 3/4t Custom Deluxe 402/auto 66k Original paint 71 3/4t 4x4 Custom Deluxe 10k original miles Original paint 71 3/4t Cheyenne 402 70k original paint 72 3/4t 4x4 Custom deluxe 72 3/4t 4x4 Custom deluxe 91k original paint 72 Cheyenne/30 Dually 69 Camaro SS396 4-speed 13 GMC 2500HD Duramax I bought new 05 Jeep Wrangler "Willys Edition" 12k miles (I bought new) 85 3/4 ton 4x4 Scottsdale 33k miles original paint 86 1 ton 4x4 SRW Silverado 454 restored 80 1 ton 4x4 SRW Silverado 9,434 original miles!! original paint 95 GMC 1 ton dually 4x4 my dad bought new 95 GMC 3/4 ton 4x4, regular cab 454, 31k original miles 2002 2500HD 4x4 regular cab 6.0L 67k miles 2002 2500HD 4x4 regular cab 8.1L 28k miles 2003 GMC 2500HD 4x4 regular cab Diesel 93k miles 67-72 Parts for sale

01-05-2005, 12:03 PM	#7
Erl Registered User Join Date: Mar 2002 Location: Dallas, TX Posts: 555	Jake, I have a section of 4x4 frame that can be used as a pattern. I will send you the section and the part numbers. Just return it when finished. I am planning on generating a mechanical drawing of the power steering pump bracket (for Jolley's 6066 page), but it will be a couple more months. Email me your UPS address to erl@pushcorp.com Erl __________________ 1968 GMC 305 V6 3/4 4x4 Stepside 06 Corvette Daily Driver Dallas TX

01-05-2005, 09:16 PM	#8
BobS Senior Member Join Date: May 2001 Location: West Central Minnesota Posts: 568	Nice truck, I can't wait to see it when it's done! Bob __________________ V-6....only GMC Trucks have it! 62 GMC W5000 NAPCO-V6 65 GMC 2500 NAPCO Panel-V6 66 GMC 1000-V6 66 GMC 1500-V6 67 GMC K1500-SBC (originally a KM-V6) 68 GMC C1500-V6 68 GMC C1500-V6 68 GMC Suburban C2500 70 Chevy K20-SBC 71 Chevy C30 Longhorn-SBC 72 GMC Suburban C1500-BBC 72 Chevy C10-SBC 72 GMC C5500-ToroFlow Diesel

01-03-2005, 01:57 AM	#2
60apache4 Account Suspended Join Date: Nov 2001 Location: Oregon Posts: 147	Have you tried www.6066gmctrucks.org? These guys really know their GMC V-6's. Try and find a parts truck that came with the GMC V-6 and optional turbo 400 auto tranny from about 1965 -1968; it will have the correct flexplate that you need to adapt to the auto tranny. I'm not sure about the auto trans/adapter/ t-case etc. questions...Hope this helps.

01-03-2005, 02:05 AM	#3
68305E Registered User Join Date: Dec 2004 Posts: 8	thanks, that site is a big help. the guy who sells teh adapter plate in only about 20 miles from me, small world on the world wide web.. Thanks again. Jake

01-04-2005, 05:45 PM	#5
68305E Registered User Join Date: Dec 2004 Posts: 8	I woudl appreciate any and all info/part numbers you can send to me. feel free to email me directly at jakem@starband.net Also any instructions in dimpeling the frame? Pic? Thanks so much. and nice truck...!! Jake

01-06-2005, 10:26 AM	#9
Erl Registered User Join Date: Mar 2002 Location: Dallas, TX Posts: 555	Jake, Here are the part numbers Power Steering belt NAPA XL 24-9550 Drag Link NAPA ES-234R Drag Link NAPA 269-2441 Steering Coupler NAPA 269-1105 I will send the frame section today. Erl __________________ 1968 GMC 305 V6 3/4 4x4 Stepside 06 Corvette Daily Driver Dallas TX



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