are these the clamshell mounts i need for a sbc?

[garyl24]

i have never done this and want to be sure these are what is needed to put a sbc 350 or a sbc 305 in my 86 olds cutlass. thanks for any help
http://store.summitracing.com/partdetai ... toview=sku

and these are the frame mounts i was going to get
http://store.summitracing.com/partdetai ... toview=sku

 

[Blake442]

Those'll work just fine.

 

[jrm81bu]

I'm not really sure the first link you have for the block side will work with the factory style rubber mounts. I think they only work with these.
http://store.summitracing.com/partdetai ... toview=sku

 

[joe_padavano]

Unfortunately, you're all wrong. There were two different styles of motor mounts over the years. The older style (1960s and early 70s) used rubber mounts bolted to the block and metal brackets on the frame. The newer style (mid 70s-up) used the rubber clamshell on the frame and a metal bracket on the block. The rubber clamshell shown in the first post in this thread is correct. The metal bracket is not. The one shown in the first post is an all metal replacement for the 1960s style rubber mount that bolts to the block. The factory metal block brackets used on the G-body cars are usually not sold aftermarket because they don't wear out. Try a wrecking yard for just about any Chevy built in the 1980s.

If you want to sell the Olds motor frame brackets, please PM me.

 

[garyl24]

thans guys i will keep looking

 

[86oldsgbody]

I have some like these along with the top ones you have there.
I'm not sure if these are the exact ones but this is what they look like. Just to get you in the right ball park.
http://store.summitracing.com/partdetai ... toview=sku

 

[85 Cutlass Brougham]

I have some like these along with the top ones you have there.
I'm not sure if these are the exact ones but this is what they look like. Just to get you in the right ball park.
http://store.summitracing.com/partdetai ... toview=sku

Those are solid fame side mounts. I would not use them on a street car. Use the Clamshell mounts from the first post, but pull a set of the block side brackets from a junkyard. While you are there, also get all of the bolts that hold the bracket to the block, and get the long through bolt that connects the two halves. They are all special length fasteners for those applications, and it is easier to just get them from the car you source them from. I actually went as far as to pull a 305 from a Grand Prix in a U Pull It yard and take every nut, bolt, washer, bracket and pulley from the same car so I would have a complete set. If possible, bring a digital camera with you into the yard and document how the donor vehicle went together with 20-30 pictures. Try to take pics showing individual parts with their respective fasteners too. Remember that a cheap digital camera ($20-30 at Wal Mart) is your best ally when it comes to dismantling and reassembling a car.

 

[jrm81bu]

Unfortunately, you're all wrong. There were two different styles of motor mounts over the years. The older style (1960s and early 70s) used rubber mounts bolted to the block and metal brackets on the frame. The newer style (mid 70s-up) used the rubber clamshell on the frame and a metal bracket on the block. The rubber clamshell shown in the first post in this thread is correct. The metal bracket is not. The one shown in the first post is an all metal replacement for the 1960s style rubber mount that bolts to the block. The factory metal block brackets used on the G-body cars are usually not sold aftermarket because they don't wear out. Try a wrecking yard for just about any Chevy built in the 1980s.

If you want to sell the Olds motor frame brackets, please PM me.

Not to argue, but I was right. The first ones the op posted are not factory replacements for anything. They are the block side mates to the frame side mounts that I listed in my first post. They are aftermarket solid motor mounts for racing.

 

[joe_padavano]

Not to argue, but I was right. The first ones the op posted are not factory replacements for anything. They are the block side mates to the frame side mounts that I listed in my first post. They are aftermarket solid motor mounts for racing.

Then why does the listing at Summit say this:

Moroso solid steel motor mounts replace stock, OEM-style rubber mounts...

The OP asked about block side and frame side mounts. The frame side mounts in that post are the correct clamshell mounts. These require the OEM metal bracket that comes on all SBCs built since the mid-1970s.

The block brackets in that thread are these:

They are not intended to mate to the clamshell mounts but are intended to replace these from the 1960s that bolt to the block:

As I noted above, the stock frame-side brackets for the G-body are solid metal and don't wear out, so they are not offered by the aftermarket.

 

[jrm81bu]

Read the app guide and suggested parts on the summit ad. They do replace the rubber style mounts. Completely eliminating any rubber mount.
The second link the op listed is the correct frame side mount. I agree with that, but the first link is not made to work with the older style mount.
http://store.summitracing.com/partdetai ... toview=sku
http://store.summitracing.com/partdetai ... toview=sku

Those two links are designed to work with each other. And you left out a litlle of the quote from summit's page:
The mounts made for racing.
Moroso solid steel motor mounts replace stock, OEM-style rubber mounts to eliminate torque loss and binding linkages, a common result of excessive engine movement. These solid steel mounts eliminate the need for bulky torque straps and chains, and are covered with a protective zinc coating.