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Old 01-13-2019, 10:39 PM   #117
Vintage Windmills
Vintage 4x4s
 
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Join Date: Sep 2010
Location: Prior Lake, MN
Posts: 4,305
Re: K30 Downgrade to Cummins Project

Got the trans/tcase/gearvendors fitted in. I have the engine at 4 degrees (front higher than rear) and the rear pinion angle is about 4.5 so its pretty close. Its all shoehorned it but I think there is enough clearance for everything, but top two tranny bolts will be a pain unless I can drop the tranny crossmember and count on the engine mounts flexing a little...

I need to figure out where to mount the AC compressor, the low position beneath the water inlet won't clear the frame and crossmembers since my engine needs to be low in the frame. I was reading that one from freightliner application may work but need to find where to purchase but need to first confirm it will work.

As for the radiator to engine - with the BBC 3 core rad in factor position, there is 3 inches to the tip of the threaded shaft where the mech fan would mount. I don't have a mech fan handy to measure, can someone tell me if that would fit? I'm betting no and that I need to run efans. Probably good anyways since this truck won't be used in town or traffic much. Mainly a highway truck and highway tow rig.

I am fighting to log into the site on my iphone, I don't think there is an app for this site? apparently Safari doesn't work with the site.. So its a pain to get photos on
here.

Ryan, good to hear the poly 1st gen ones aren't too bad. Trying to see if they'll sell me just the isolators. Do you have just two isolators under your engine or 2 per side? They are saying a quad mount is recommended for 400+ HP.
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67 GMC K1500 Custom- 305V6 SM420, PTO, Ram Assist, yellow (the outcast) (project period correct upgrades)
67 GMC C2500 351V6 TH400, AC, PS, PB (can't decide what to do with. Update, decided to keep and will restore )
86 CHV K30 502 th400, apple red NEW
71 CHV K20 350 SM465, ochre (saved work truck)
71 CHV K20 292 SM465, white, tach, PTO, (future project)
72 CHV K20 350 350th, medium blue (project stocker)
01 CHV K2500hd crew, indigo blue

^3 dont run and the others don't see winter either
'86 K30 Cummins "Fireside" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=649649
'71 K20 "get driveable" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=590642
'72 K20 Build Thread: http://67-72chevytrucks.com/vboard/s...=493477&page=6

Last edited by Vintage Windmills; 01-13-2019 at 10:48 PM.
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