1960 GMC 1000 Motor Swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CHEVY_71_C20 · 06-04-2020, 01:13 PM

Hi All,

Currently, my truck has the original good running 305 v6 with about 93k miles on it. The transmission is the 3-speed on the floor. I'm wanting to swap out the old motor and transmission but having a tough time figuring out what swap to go with. I have around $10K as a budget. this will be my daily driver during the spring to fall. looking for about 300-400hp and converting it to automatic. what is a good reliable option to go with for my budget?

**cwcarpenter98** · 06-04-2020, 02:04 PM

I think with your budget, you could get either an ls or a sbc. If you want better gas mileage, go ls. If you want the cool factor, go sbc. It might be easier to get the power numbers that you want with an ls. My personal preference is sbc, but I'm a little biased

CHEVY_71_C20 · 06-11-2020, 06:52 PM

Found a 400 sbc and a 700R4 transmission. Both brand new and under budget. I'm having a tough time finding motor mounts and transmission cross member. Does anyone make a conversion kit?

**Captainfab** · 06-11-2020, 09:28 PM

There are no aftermarket engine mounts available for the '60-'62 frames. The factory side mounts for a small block are extremely rare. What does work are the engine mount brackets for the '67-'72 with a small block. Those will work with a 1/4" thick spacer on top of the frame. There are no aftermarket trans crossmembers either for the '60-'62 frames. I am currently working on reproducing the factory auto trans crossmembers for the '60-'62 short wheelbase frames, but I don't think it will work with a 700R4 unless you move the engine forward to compensate for the difference between a PG/TH350 and the 700R4.

sstock · 06-12-2020, 09:32 AM

Quote:

Originally Posted by Captainfab

There are no aftermarket engine mounts available for the '60-'62 frames. The factory side mounts for a small block are extremely rare. What does work are the engine mount brackets for the '67-'72 with a small block. Those will work with a 1/4" thick spacer on top of the frame. There are no aftermarket trans crossmembers either for the '60-'62 frames. I am currently working on reproducing the factory auto trans crossmembers for the '60-'62 short wheelbase frames, but I don't think it will work with a 700R4 unless you move the engine forward to compensate for the difference between a PG/TH350 and the 700R4.

Very nice Captain.

06-04-2020, 01:13 PM	#1
CHEVY_71_C20 Registered User Join Date: Feb 2013 Location: boise idaho Posts: 15	1960 GMC 1000 Motor Swap Hi All, Currently, my truck has the original good running 305 v6 with about 93k miles on it. The transmission is the 3-speed on the floor. I'm wanting to swap out the old motor and transmission but having a tough time figuring out what swap to go with. I have around $10K as a budget. this will be my daily driver during the spring to fall. looking for about 300-400hp and converting it to automatic. what is a good reliable option to go with for my budget? Attached Images

06-04-2020, 02:04 PM	#2
cwcarpenter98 Senior Member Join Date: Jan 2018 Location: Hickory Flat, GA Posts: 4,493	Re: 1960 GMC 1000 Motor Swap I think with your budget, you could get either an ls or a sbc. If you want better gas mileage, go ls. If you want the cool factor, go sbc. It might be easier to get the power numbers that you want with an ls. My personal preference is sbc, but I'm a little biased __________________ Christian Carpenter 1963 C10 - Frankentruck 283, Muncie 3 speed with overdrive Overdrive wiring here 1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 --> Soon to be 350, Saginaw 4 speed 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson

06-11-2020, 06:52 PM	#3
CHEVY_71_C20 Registered User Join Date: Feb 2013 Location: boise idaho Posts: 15	Re: 1960 GMC 1000 Motor Swap Found a 400 sbc and a 700R4 transmission. Both brand new and under budget. I'm having a tough time finding motor mounts and transmission cross member. Does anyone make a conversion kit?

06-11-2020, 09:28 PM	#4
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: 1960 GMC 1000 Motor Swap There are no aftermarket engine mounts available for the '60-'62 frames. The factory side mounts for a small block are extremely rare. What does work are the engine mount brackets for the '67-'72 with a small block. Those will work with a 1/4" thick spacer on top of the frame. There are no aftermarket trans crossmembers either for the '60-'62 frames. I am currently working on reproducing the factory auto trans crossmembers for the '60-'62 short wheelbase frames, but I don't think it will work with a 700R4 unless you move the engine forward to compensate for the difference between a PG/TH350 and the 700R4. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE



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