Olds 455 in a '70 C10 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Stainless · 02-09-2003, 08:53 PM

Hey all.... with some great advice from Crazy Longhorn... I talked myself into buying an Olds 455 with a TH400 transmission to put into my 1970 C10.... I have heard that I can use engine mounts from a V-8 olds.... or chevy BB.... What about the tranny crossmember? The chevy bolts to the bellhousing.... but the olds is on the tail of the tranny.... Anyone mess with that before? I have swapped motors before, but only same parts. Any advice for a newb would be appreciated!!!

~Sean

crazy longhorn · 02-09-2003, 09:53 PM

You need the auto trans crossmember for the pickup(it mounts under the tail of the trans). the bell mount stick crossmember can be removed from the frame. As far as the mounts/stands/brackets, a late 70's truck with a 5.7 deisel was the donor on my swap. the eng mounts themselves will be the same as a late 60's-mid 70's cutlass(napa crossed them for me). the Chevy eng mounts wont bolt to the Olds block, but you might use the 72 BB stands to get the nose height down a little on the Olds....if you can find a set. if the truck deisel brackets arent available, you can substitute a set of olds car brackets to mount to the stands, but need to look for a set with a short height, & plan on welding them to the frame stands. That BB olds is a powerhouse, & right at home in a 4000 lb truck.........good luck, crazyL

O'l Buck · 02-09-2003, 11:03 PM

CrazyL hit the nail right on the head. The 5.7 diesel motor mounts would be the best way to go. I put a 350 olds in a 49 ford F-3. I fabbed up my mounts because I didn't have any olds mounts out of the car. The one's I built are way stouter than the factory mounts anyway.

**1970 CST Short Wide** · 02-09-2003, 11:05 PM

I have an automatic cross member from a 72 $50 plus shipping

02-09-2003, 08:53 PM	#1
Stainless Registered User Join Date: Jan 2003 Location: N.Canton Ohio Posts: 59	Olds 455 in a '70 C10 Hey all.... with some great advice from Crazy Longhorn... I talked myself into buying an Olds 455 with a TH400 transmission to put into my 1970 C10.... I have heard that I can use engine mounts from a V-8 olds.... or chevy BB.... What about the tranny crossmember? The chevy bolts to the bellhousing.... but the olds is on the tail of the tranny.... Anyone mess with that before? I have swapped motors before, but only same parts. Any advice for a newb would be appreciated!!! ~Sean

02-09-2003, 09:53 PM	#2
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	You need the auto trans crossmember for the pickup(it mounts under the tail of the trans). the bell mount stick crossmember can be removed from the frame. As far as the mounts/stands/brackets, a late 70's truck with a 5.7 deisel was the donor on my swap. the eng mounts themselves will be the same as a late 60's-mid 70's cutlass(napa crossed them for me). the Chevy eng mounts wont bolt to the Olds block, but you might use the 72 BB stands to get the nose height down a little on the Olds....if you can find a set. if the truck deisel brackets arent available, you can substitute a set of olds car brackets to mount to the stands, but need to look for a set with a short height, & plan on welding them to the frame stands. That BB olds is a powerhouse, & right at home in a 4000 lb truck.........good luck, crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

02-09-2003, 11:03 PM	#3
O'l Buck Recovering Truck Driver Join Date: Mar 2002 Location: Orleans, NE USA Posts: 1,883	CrazyL hit the nail right on the head. The 5.7 diesel motor mounts would be the best way to go. I put a 350 olds in a 49 ford F-3. I fabbed up my mounts because I didn't have any olds mounts out of the car. The one's I built are way stouter than the factory mounts anyway. __________________ 67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska

02-09-2003, 11:05 PM	#4
1970 CST Short Wide Senior Moment Join Date: Mar 2002 Location: Pittsburg Ca Posts: 4,101	I have an automatic cross member from a 72 $50 plus shipping __________________ 1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565



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