for 1960 - 1966 Chevrolet Pickup Trucks



There are some differences between the motor mount perches used for the 6-cylinder and the V-8. When I say "perches", I am referring to the bracket or tower that bolts to the frame rail and the front end cross member to which the motor mount (the rubber piece) bolts. Some call them towers. The motor mounts themselves are the same for both engine types but the perches are different.

First off, the motor mounts for the 292 cid 6 cylinder are staggered. That is to say, the right motor mount is about 3" further forward than the left motor mount. On the V-8 and the 230/250 I-6 they are even or straight across for each other.

Next, the left-side perch (driver's side) for the 292 I-6 and V-8 are the same. But the passenger's side perches are different. For the 292 I-6, the perch is smaller and bolts to the forward-most set of holes in the frame and cross member. The passenger's side perch for the V-8 and the 230/250 I-6 is the same size as the driver's side - in fact, it is a mirror image - and bolts to the rear-most set of holes in the frame and cross member.

So actually, if your converting from a 292 you only need to find a right-side perch to make the switch-over. If you converting from a 230 or a 250 6-cylinder, you're ready to go with what you have.

Check the photos below.



These are the perches for the V-8 and the 230/250 I-6  installation. They are the same size and, in fact, are mirror images of one another.




These are the perches for the 292 cid I-6 set-up. As you can see, one is smaller than the other (it goes on the passenger's side).The larger one is exactly the same as the driver's side for the other engines.



On the left is the 292 I-6 perch (passenger's side) and on the right is the one for the V-8 and 230/250. The 292 bracket is shorter and shaped differently than the one for the V-8. The 292 perch bolts in the front-most set of holes and the V-8 perch mount in the rear-most holes.
On the left is the perch for the V-8 (driver's side) and on the right is the one for all the I-6s. As you can see they are identical and mount in the same holes. (I took pictures of both in case you didn't believe me!) A special thanks to Richard Twiddy for providing the perches for these photographs.


This will be "work in progress" until we figure it all out. If you have any additional information please CONTACT ME so we can make this as accurate as possible. This is what we have so far:
1960-62 GMC to SBC V8 motor & trans mounts

The following shows one method of converting a 60-62 GMC V6 to a 350 Chevy small block engine with a tail shaft mounted transmission using '67-'72 frame perches. This would apply to a Powerglide or Turbo 350 automatic, or manual 4 speed transmission such as the Borg Warner Super T10, or Muncie M21 or M22.


'67-'72 frame perches are available from OER

Art Breed contribuited this picture of a 1960 1/2-ton, Powerglide, SWB pickup that was purchased new by his father on April 15, 1960. Motor mounts, perches, rear crossmember can be seen in all their original glory. Click on the picture to enlarge.
This a picture of the front cross member on a 1961 Apache. I'm not positive but the seller on eBay says it's for a V8. From his responses to questions asked by bidders, I'm not real confident he knows for sure what it is. One bidder says they are for '60 and '61 only. I suspect they are for '60 to '62 for trucks with automatic transmissions, at least on the 1/2 and 3/4-ton trucks, since the manual transmission used the front horseshoe mount with the two rear side mounts on the bellhousing.
Here are some more motor mount perches that were listed on eBay, but, again, not real sure of the exact application. They look like the ones in the photo above. They were listed as '60 - '62.

Ryan Osborn of Kenton, Ohio adds the following:
The 1962 motor mounts shown here were in our our one ton grain trucks. We had three 1962 1 ton trucks on the farm that were bought new by my great uncle. They all shared the same mounts, so they are for more than just automatics.These trucks were all V8s with 4-speed granny transmissions, hydraulic clutches and at least one I know for sure had the rear bellhousing mounts.
Here are a couple of pictures of Kevin Timm's mounts as installed on his '62. He says they're '67 - '72 perches as near as he remembers. Holes have to be drilled to accommodate the perches.
Here's another picture of Kevin's mounts. David (chevyboy62) also did the same thing on his '62. He says they are a '67 - '72 application. They are also very similar to the '63 - '66 perches but as you can see, the end of the tower that bolts to the cross member bends in at a little different angle and must make a better match to the early cross member.

Here's a view of the '60-'62 motor mount for the inline 6 motors. The V8s used a similar, if not exact, setup. It bolts to the front of the block under the crank pulley. I believe that these were used only on trucks with manual transmissions.

Here are some comments from Boyd London:

I changed over a 6 to a V8 on my 61.  The V8 used a horseshoe collar that attached to the engine in the front just like the 6.  Don't know if it was the same collar because I mistakenly left that mount attached to the 6 when I gave it away, thinking no way a V8 mounts that way.  The two mounts on the cast iron bell housing make up the 3 point triangle needed for a firm mount.  This mount actually works very well.  I was able to purchase a factory horseshoe mount correct for my year from the dealer, along with the rubber mount between the horseshoe and the frame (this was in 1975). 


Here's what a 4x4 motor mount looks like. This one fits '63s thru '69s. It is riveted inside the frame and there is a left and a right. Photo courtesy of Ron David

Here is a picture showing the rear cross member for manual transmission trucks. The rear mounts are on the sides of the bell housing. Trucks equipped with automatic transmissions did not have this cross member but one further back that caught the mount on the tailshaft of the transmission. If you're going to an automatic this cross member has to go. It's totally in the way and since it serves no structural purpose, it won't be missed. Thanks to Ron David (sidworks on chevtalk) for the photo.