71 K10 - engine swap question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Vintage Windmills · 02-25-2019, 02:35 PM

I agree with Grumpy old Man on his points. I did my 71K20 it last year at this time with that method. Left the SM465 where it was. I had good luck with the plastic alignment tool.

All in all a pretty easy job. Way easier than a Cummins swap lol!

travisch · 02-25-2019, 02:41 PM

Thanks - New blueprint 350 crate (BP3503CT1), flywheel, intake and misc gaskets on the way. Just need to figure out which clutch I want. Silly to not replace it while I have it apart.
I'll let ya know how it goes.

travisch · 03-11-2019, 11:50 AM

The swap went well. took about and hour to get the old engine out and a couple to get the new one back in. All in all it was a full day at a slow easy pace.
No surprises. I used the original cast iron exhaust manifolds and everything bolted right up. I re-ran the Wizard on the Holly Sniper and it fired right up.

02-25-2019, 02:35 PM	#1
Vintage Windmills Vintage 4x4s Join Date: Sep 2010 Location: Prior Lake, MN Posts: 4,305	Re: 71 K10 - engine swap question I agree with Grumpy old Man on his points. I did my 71K20 it last year at this time with that method. Left the SM465 where it was. I had good luck with the plastic alignment tool. All in all a pretty easy job. Way easier than a Cummins swap lol! __________________ 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

02-25-2019, 02:41 PM	#2
travisch Registered User Join Date: Jan 2019 Location: Pine bluffs, WY Posts: 17	Re: 71 K10 - engine swap question Thanks - New blueprint 350 crate (BP3503CT1), flywheel, intake and misc gaskets on the way. Just need to figure out which clutch I want. Silly to not replace it while I have it apart. I'll let ya know how it goes.

03-11-2019, 11:50 AM	#3
travisch Registered User Join Date: Jan 2019 Location: Pine bluffs, WY Posts: 17	Re: 71 K10 - engine swap question The swap went well. took about and hour to get the old engine out and a couple to get the new one back in. All in all it was a full day at a slow easy pace. No surprises. I used the original cast iron exhaust manifolds and everything bolted right up. I re-ran the Wizard on the Holly Sniper and it fired right up.

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