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Old 10-11-2018, 03:50 PM   #20
BigDooley77
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Join Date: Sep 2016
Location: No Where,KS
Posts: 57
Cool Re: 1977 GMC CCDW build

so a small amount of time has gone by and the teeth on the flexplate are not doing well no matter what I do more shims less shims ugh keeps grinding well now the teeth are destroyed so I had to change the flexplate the th400 is dead in the way don't you know. so I changed the flexplate to a fancy 6 bolt one because I just picked up a 4l80e well what a perfect time to put it all in right before the monsoon here in Kansas. its in the truck now i rushed getting the controller i wish i would have researched just a little more i got a painless but really its a USShift which i don't mind... just that the USShift branded one was slightly cheaper... you live you learn. now i know guys are gonna say you could go Holley and have efi and a trans controller for not much more and i agree but that's if your staying with a gas engine my plan is to go 12v so i don't need the efi stuff, but i do need a controller. I dabble with LS engines and thought about just building one but after adding it all up i just didn't see the "cheapness" of building it these aftermarket systems come with really easy tuning software and so many cool options!.

so i built a bracket for the computer and put it in my center console outta sight but its easily accessible if i need to get to it. the 80e swap was fairly straight forward and the th400 trans mount fit the 4l80e. i added an HD2 kit and oversized the AFL valve piece of mind. I'm still finishing this part up.
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1977 GMC Sierra Classic CCDW. 454 worked 781s, 277/287, Lift .502/.501 LS 114, Dual plane intake, Dana 70 (4.10) and 4L80e (HD2 kit).

http://67-72chevytrucks.com/vboard/s...63#post8361863

Last edited by BigDooley77; 10-12-2018 at 11:26 AM.
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