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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: BigHemi353 on December 25, 2008, 11:44:44 pm

Title: Cummins Conversion Questions
Post by: BigHemi353 on December 25, 2008, 11:44:44 pm
Ive searched and searched and have found no straight answers so its time to ask questions. lol  Starting the tear down of my 86 K-20 Silverado and my plans are to put a 6BT 12valve non intercooled Cummins, nv4500 tranny and a 205 transfer case in it. this is going to be strictly only a cruising truck and pulling a gooseneck horse trailer on occasion. i would like to stay away from body lifts(never liked them) and im going with a 4in suspension lift to clear the oil pan of the 6bt. my questions are.....

1. What nv4500 should i look for? Chevy or Dodge?

2. Will i have to fabricate a new tunnel to fit the nv4500 trans? (ive seen that some have and some have not)

3. Will i have to hammer/push back my firewall to fit the cummins?(ill more than likely be using Avalanche Engineering's crossmember. http://www.avalancheengineering.com/xmember73-91.html (if that means anything))

4. What # spline 205 should i look for?

5. And any other pointers/tips that you might have experienced?

Any help would be greatly appreciated. This is going to be a long project but it will be worth it in the long run.

Thanks, Andy
Title: Re: Cummins Conversion Questions
Post by: joesgarage71 on December 26, 2008, 09:37:41 am
 Do a Google search 6bt and 4bt.

thedieselstop.com
4btswaps.com
cumminsforum.com

Theres all kinds of info out there keep us posted.
 Steve
Title: Re: Cummins Conversion Questions
Post by: BigHemi353 on December 26, 2008, 10:25:55 am
thanks, ill take a look
Title: Re: Cummins Conversion Questions
Post by: Captkaos on December 27, 2008, 10:08:47 pm
79 Diesel has one is his..