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#1495518 Thu Apr 06 2023 01:51 PM
Joined: Nov 2021
Posts: 888
Anyone done this. Looks like there is a extra set of holes for the top of the mount, but no flat area on the cross member?

It would help with my 5 speed conversion to move it forward the 3 inches due to the shifter being so far back.

1966 C-10 Step Side
A Project Journal
Joined: Sep 2009
Posts: 3,586
Gearhead, Moderator for The Swap Meet and General Truck Talk

Just a thought, but have you considered/checked the clearance space available if you move the engine and oil pan sump forward that far???

I attached a screenshot of the front frame with suspension taken from the '66 Truck Heritage site documents below. IIRC, that oil pan sump doesn't have a lot of clearance in it's original position with the steering components mounted to the rear of the engine support cross member. Could pose a problem with pan contacting the steering center link as it travels back and forth during turns???

Will also affect your accelerator controls I believe.

Just some food for thought.


Attached Images
Front cross member and steering clearance 1966-Chevrolet-Truck.pdf.png (216.4 KB, 73 downloads)
'66 front frame and suspension


1951 Chevy 3 window 3100 (My Grandpa's hunting truck)
1966 Chevelle (Wife's Hot Rod)
2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998)
Com Fac Maint Lead Tech Retired (1998-2021)

Finally time to get to work on my Grandpa's (now mine) truck!
Joined: Nov 2021
Posts: 888

Will have to look at that. Thanks.

1966 C-10 Step Side
A Project Journal
Joined: Sep 2011
Posts: 2,838
The engine perches align with the rear holes on the upper flange of the frame. The 292 engine has a staggered perch, which is why there is an extra hole on the frame flange. If you move the engine forward, then the cast-iron bell housing will not line up with the crossmember for the bell.

Folks who install an LS engine in a 1963–1966 C10 usually move the engine forward a bit to allow clearance for the rear coil pack on the passenger side at the firewall. The same is true with folks who install a SBC with tall valve covers.

Last edited by Lugnutz; Sat Apr 08 2023 01:16 AM.
Joined: Nov 2021
Posts: 888
Looks like there is room on steering and crossmember. Front set of holes will work on frame, but there is no flat on the cross member for the mount to sit on.

Do people just drill and bolt to the cross member?

1966 C-10 Step Side
A Project Journal
Joined: Feb 2004
Posts: 26,953
Kettle Custodian (pot stirrer)
I believe those extra holes are on the passenger's side only, for the offset motor mount used with the 292 inline six. Changing motor mount positions will affect a lot of other things, such as driveshaft geometry, clutch linkage, fen to radiator clearance, etc.

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Joined: Mar 2019
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Not to mention the little things like wire harnesses, hoses, exhaust, etc. They are just little things till there's a lot of em tho. 🥴

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