Installing a 5.7/6.1 liter HEMI in a 71 Challenger Conv.

Author Topic: Installing a 5.7/6.1 liter HEMI in a 71 Challenger Conv.  (Read 937 times)

Offline whitsend

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Installing a 5.7/6.1 liter HEMI in a 71 Challenger Conv.
« on: January 08, 2009 - 10:28:15 AM »
I have been thinking about this for a while but have alot of questions.

1. How much work is involved?

2. Can I use the K-frame with special motor mounts?

3. What type of wiring problems will I come across?

4. What kind of money am I looking at with wiring and motor mounts and any other misc stuff I can't think of right now to actually complete this?

5. What trans can be used with this engine?

6. Does this require alot of fab work? Like new trans mount, cutting the floor, firewall alteration?

7. Is this something best left to a professional shop or is it doable by the average guy?

Thanks for your time.

Whitsend:




Offline 72hemi

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Re: Installing a 5.7/6.1 liter HEMI in a 71 Challenger Conv.
« Reply #1 on: January 08, 2009 - 10:42:24 AM »
1. How much work is involved? There is a fair amount of wiring involved due to the computer controlled fuel injection and some modification to the fuel system to accomodate the fuel injection.

2. Can I use the K-frame with special motor mounts? Yes there are motor mounts available as well as special headers. I believe that TTI exhaust carries both.

3. What type of wiring problems will I come across? There are harnesses and computers available that are tailored for this application now, but aren't cheap.

4. What kind of money am I looking at with wiring and motor mounts and any other misc stuff I can't think of right now to actually complete this? When I priced everything it was looking like the total was going to be around $11,000

5. What trans can be used with this engine? Any transmission that can be attached to the LA style small block will work (727, 518, 833, Tremec 5-speed, and T-56 but the T-56 requires floor modification)

6. Does this require alot of fab work? Like new trans mount, cutting the floor, firewall alteration? Not much fab work involved now a days with all of the parts being available.

7. Is this something best left to a professional shop or is it doable by the average guy? That is really up to you and your confidence level in the work you do.

There are a few threads on this subject on here. Several members are doing the conversion. I have a lot more information on this at home and will pull it up for you this evening, including part numbers and suppliers.
1972 Dodge Challenger 340 6 Pack 4-speed
1996 Dodge Viper GTS Coupe

Offline whitsend

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Re: Installing a 5.7/6.1 liter HEMI in a 71 Challenger Conv.
« Reply #2 on: January 08, 2009 - 11:34:37 AM »
Wow... that is awesome. Thank you. The amount of information on this site is mind boggleing. I am not sure I will be able to afford to do this but I would really like to. Thanks for all the answers.

Whitsend


Offline whitsend

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Re: Installing a 5.7/6.1 liter HEMI in a 71 Challenger Conv.
« Reply #4 on: January 09, 2009 - 08:18:10 AM »
Thanks much dodgeboys!  :cheers:

Whitsend