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#1 |
Registered User
Join Date: Oct 2006
Location: Temecula,CA
Posts: 309
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Motor and tranny swap questions
Ok here goes. Im wanting to put a big block and th400 trans that I have in my 72 C20. My truck has a 350/350 in it right now. Can I just buy the engine towers and a new tranny crossmember and bolt it in? Will i run into any clearance problems with the cab, etc...? All help is appreciated. Thanks
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Nick Old pic of my 72: http://img340.imageshack.us/my.php?image=img0435co5.jpg 04 Silverado Daily Driver 68 GMC short step http://67-72chevytrucks.com/vboard/s...d.php?t=379665 "I'll beat you to the gas station!!" ![]() ![]() |
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#2 |
Resident of Here
Join Date: May 2008
Location: Wesley Chapel, FL, USA
Posts: 7,716
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Re: Motor and tranny swap questions
I think you got it all covered. Not sure though.
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~Bradley~ 2004 Black GTO LS2/T56 too much to list ![]() Miss having a truck ![]() |
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#3 |
ASE master tech/machinist
Join Date: May 2008
Location: Blue Mound Texas
Posts: 303
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Re: Motor and tranny swap questions
You can run the small block towers if you swap them side to side, you have to drill 2 holes, but it works great. I did it on my 71 GMC 3 years back, never had any clearance issues at all, it got close on the drivers side header but never made contact. I have pics if you need them.
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#4 |
Registered User
Join Date: Oct 2006
Location: Temecula,CA
Posts: 309
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Re: Motor and tranny swap questions
Thanks for the input. I already have the towers and crossmember though. I just wanted to check to see if the tranny was going to clear the cab due to it being a low hump. Thank you again.
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Nick Old pic of my 72: http://img340.imageshack.us/my.php?image=img0435co5.jpg 04 Silverado Daily Driver 68 GMC short step http://67-72chevytrucks.com/vboard/s...d.php?t=379665 "I'll beat you to the gas station!!" ![]() ![]() |
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#5 |
Registered User
Join Date: Oct 2006
Location: Temecula,CA
Posts: 309
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Re: Motor and tranny swap questions
Anyone else have any info?
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Nick Old pic of my 72: http://img340.imageshack.us/my.php?image=img0435co5.jpg 04 Silverado Daily Driver 68 GMC short step http://67-72chevytrucks.com/vboard/s...d.php?t=379665 "I'll beat you to the gas station!!" ![]() ![]() |
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#7 |
Registered User
Join Date: Oct 2006
Location: Temecula,CA
Posts: 309
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Re: Motor and tranny swap questions
ok cool. Now i just got to do it. haha
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Nick Old pic of my 72: http://img340.imageshack.us/my.php?image=img0435co5.jpg 04 Silverado Daily Driver 68 GMC short step http://67-72chevytrucks.com/vboard/s...d.php?t=379665 "I'll beat you to the gas station!!" ![]() ![]() |
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#8 |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: Motor and tranny swap questions
I've done three big block conversions now. I found that a big block and turbo 400 will fit a low hump truck if you have fresh body mounts. Old saggy body mounts will allow the cab to rub the trans housing.
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I'm on the Instagram- @Gearhead_Kevin |
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#9 |
Registered User
Join Date: Oct 2006
Location: Temecula,CA
Posts: 309
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Re: Motor and tranny swap questions
Thank you for that. Good thing I have a new set of body bushings.
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Nick Old pic of my 72: http://img340.imageshack.us/my.php?image=img0435co5.jpg 04 Silverado Daily Driver 68 GMC short step http://67-72chevytrucks.com/vboard/s...d.php?t=379665 "I'll beat you to the gas station!!" ![]() ![]() |
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