Engine Mount Confusion

[TobyArnot]

I'm doing a valve job on my '70 350 stepper. Thought I'd R & R the front mounts while I'm in there. FYI - I didn't put this thing together, bought it this way. SPID says factory 350 so I'm think factory mounts.(ANCHOR # 2282) Nope, don't begin to fit. see pic. After some digging, found that the mounts for late '80's/early '90's GM are what I needed. (ANCHOR # 2637). What's going on here? Is this a doable setup for my '70, or has some "swapping" been done? As I look, it appears the crossmember is welded in ???? Keep in mind, the tierods and ball joints are still '70 stuff. I added dropped disk spindles a year ago and everything went together. Any thoughts?

[hjewell2]

Originally Posted by TobyArnot

I'm doing a valve job on my '70 350 stepper. Thought I'd R & R the front mounts while I'm in there. FYI - I didn't put this thing together, bought it this way. SPID says factory 350 so I'm think factory mounts.(ANCHOR # 2282) Nope, don't begin to fit. see pic. After some digging, found that the mounts for late '80's/early '90's GM are what I needed. (ANCHOR # 2637). What's going on here? Is this a doable setup for my '70, or has some "swapping" been done? As I look, it appears the crossmember is welded in ???? Keep in mind, the tierods and ball joints are still '70 stuff. I added dropped disk spindles a year ago and everything went together. Any thoughts?

1970 did not come with Clam shell mounts from the factory.

[sameyrasmea72]

Those look like 73 and newer V8 stands and mounts. As long as they are in the correct location they will work fine. Looks like they are welded on. I would drill some holes and add some bolts for extra strength and maybe get some new mounts.

[TobyArnot]

O.K., could be. Actually, they're not welded to the crossmember, that's crud. You can see the bolts in the picture. The mounts are listed for a bunch of late '80"s and early 90's GMC and Chevy, mostly trucks, Suburbans, etc. The clamshells are bolted solidly to the block. Don't know what they are from. Guessing some of the same ones listed for the mount. And they were way more expensive.

[hjewell2]

Originally Posted by TobyArnot

O.K., could be. Actually, they're not welded to the crossmember, that's crud. You can see the bolts in the picture. The mounts are listed for a bunch of late '80"s and early 90's GMC and Chevy, mostly trucks, Suburbans, etc. The clamshells are bolted solidly to the block. Don't know what they are from. Guessing some of the same ones listed for the mount. And they were way more expensive.

I would say the main reason PO switched to clam shell mounts was because the OEM mount for 1970 chevy 1/2 ton seperated and allowed the engine to rotate and crunch the hood. Mine had a factory installed safty cable installed on the driver side to prevent this. When I swapped motors I installed new poly mounts with safty tab built inside of mount. I can tell ya the bisciut mount was a PIA to get the bolt started in the mount and had to have everything lined up absolutly perfect on both side's to catch the first thread on the mount.

[sameyrasmea72]

I guess I am confused on what your question is. But I know this for sure, your entire set up (stands, mounts clamshels) are incorrect for a 1970 small block. It looks like you have the 1973/up setup (red arrow) and the original set up for a 1970 small block is the blue arrow (mounts are not in pic)

I is difficult to tell from your pic, but you could have the 1972 only(yellow arrow) bigblock stands and mounts. They are very close to looks and function of the 1973/up V8 stanhs.

What exactly is your question????

[TobyArnot]

Originally Posted by sameyrasmea72

I guess I am confused on what your question is. But I know this for sure, your entire set up (stands, mounts clamshels) are incorrect for a 1970 small block. It looks like you have the 1973/up setup (red arrow) and the original set up for a 1970 small block is the blue arrow (mounts are not in pic)

What exactly is your question????

Not really a question, just an interesting mod. I don't care about "correct". (No points). Started out just looking to replace the mounts. Looks like the '73-up stands is what I have. Engine sits and fits, so I'll install the new rubber and move on. Thanks for the info.