350 Motor mount bracket question.

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

ali_c20

Supporting Member
Supporting Member
Joined
Sep 20, 2016
Posts
2,130
Reaction score
3,244
Location
Austria
First Name
Alexander
Truck Year
1974, 1979
Truck Model
C20, K5
Engine Size
350, 350
I replaced my rubber inserts clamshell inserts with poly ones and now I have following question:

Is it better to use the original motor mount bracket which also sits on the tabs of the insert or can I also use an aftermarket bracket that only sits on the bolt?

You must be registered for see images attach
You must be registered for see images attach
You must be registered for see images attach
 

R Carnella

Full Access Member
Joined
Sep 21, 2017
Posts
383
Reaction score
856
Location
Long island
First Name
Rich
Truck Year
1990
Truck Model
Suburban V2500
Engine Size
5.3
I used the original one.
 

bucket

Super Moderator
Staff member
Moderator
Joined
Aug 3, 2010
Posts
35,425
Reaction score
44,732
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
If you have the originals, just use them. The tabs make the install much easier because you just set the engine down in there and the tabs line up the bolt holes for you.
 

chief_shotts

Full Access Member
Joined
Nov 29, 2021
Posts
116
Reaction score
125
Location
beaverton, OR
First Name
edgar
Truck Year
1986
Truck Model
k30
Engine Size
383
I replaced my rubber inserts clamshell inserts with poly ones and now I have following question:

Is it better to use the original motor mount bracket which also sits on the tabs of the insert or can I also use an aftermarket bracket that only sits on the bolt?

You must be registered for see images attach
You must be registered for see images attach
You must be registered for see images attach
I always wondered if I did it Wrong or my energy suspension mounts were wrong because of how the tabs don't both like up with the motor bracket... I guess that just how they look
 

ali_c20

Supporting Member
Supporting Member
Joined
Sep 20, 2016
Posts
2,130
Reaction score
3,244
Location
Austria
First Name
Alexander
Truck Year
1974, 1979
Truck Model
C20, K5
Engine Size
350, 350
I always wondered if I did it Wrong or my energy suspension mounts were wrong because of how the tabs don't both like up with the motor bracket... I guess that just how they look
I used the original mounts with summit racing brand inserts. The inserts are directional and if installed correctly all should line up. Except the after market stuff is different.
 

xm20k

Runs on 93 octane, caffeine, and spite
Supporting Member
Joined
May 26, 2025
Posts
1,195
Reaction score
3,108
Location
Girard, Ohio
First Name
David
Truck Year
78
Truck Model
c10
Engine Size
388
The last set of clam shells would not fit the stock lowers they are for a narrower frame mount (solid mounts) I recognize them because I'm using a set on my 78.
 

ali_c20

Supporting Member
Supporting Member
Joined
Sep 20, 2016
Posts
2,130
Reaction score
3,244
Location
Austria
First Name
Alexander
Truck Year
1974, 1979
Truck Model
C20, K5
Engine Size
350, 350
The last set of clam shells would not fit the stock lowers they are for a narrower frame mount (solid mounts) I recognize them because I'm using a set on my 78.
I used the picture as an example as far as I can remember...
 

Latest posts

Forum statistics

Threads
48,666
Posts
1,074,173
Members
43,337
Latest member
kfrdavid
Top