S&P LS-1 Conversion mounting plates - Any Problems???
Thread Starter
TECH Senior Member
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Joined: Feb 2002
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From: Schaumburg, IL
S&P LS-1 Conversion mounting plates - Any Problems??? Mark and I are working on his Vette, and went to install the motor on Saturday, and we have a problem with the engine mounts. The frame was set up for a standard GM small block chevy, so since he descided to use a LS-1 bought the S&P relocation brackets for the engine block. Well it appears that the mounts are about 1/2" to 3/4" (overall) too far apart and the bolt holes for the "through" bolt do not line up.
Just looking for peoples feed back. Thanks!
Just looking for peoples feed back. Thanks!
Last edited by Xsta Z 28; Jun 7, 2004 at 09:54 PM.
Teching In
Joined: Oct 2003
Posts: 42
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From: Katy,Tx
S&P mounts Yes, I had the same problem with my Ventura when using their adapter plates. I just made the holes in the frame a little oblong and slid the original steel frame mounts up some. Although this raises the motor slightly. I also read where someone cut and shortened the steel frame mounts some to fix the problem. Which would keep the motor at the correct height.
I have bought a lot of stuff from S and P over the last few years and the one and only part I remember fitting without modification was an EGR blockoff plate for an LT1. I bought a set of accessory brackets for a SBC and the pass side bracket had 3 holes but only 1 lined up with the 3 holes in the heads. When I called them to ask, they said, "it should fit, but if not just drill and tap the heads" They are a poor company to deal with, but sometimes you have to, cause they are they only ones even attempting to make certain parts.
Staging Lane
Joined: Jan 2003
Posts: 70
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From: Grand Rapids,Mi
I had the same problem also. I used Energy Suspension mounts with them and thought maybe they were the problem. I guess they were not the problem after all. I just oblonged the holes in the Energy Sus. mounts and finallly got them to line up.
Thread Starter
TECH Senior Member
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From: Schaumburg, IL
Thanks for the replies. At first I was worried the custom fabbed frame was our problem, but they are jig welded so I had a very hard time believing. Mark is going to have some custom made 1/4" thick steel plate cut and welded with studs and all should be good in the world. We test fitted the engine and figured that would be our best bet, and 1/4" thick steel shoul be strong enough.
Yeah, I am a little skeptical of a 1 size fits all so I opted to custom fab my own out of 1/4" steel plate to work with the old frame mounts. Strong as heck too. Good Luck with your vette 
Remington
Remington
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I would make custom plates.. they are not rocket science and most the benefit of the S&P ones is that they are pretty 
I went with a modified version of the BRP ones as they moved the engine too far forward..
S&P should take them back.. ive returned stuff there before.
I went with a modified version of the BRP ones as they moved the engine too far forward..
S&P should take them back.. ive returned stuff there before.
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i have s&p motor mount adapters.... I USED A SOLID MOTOR MOUNT ON THE PASSANGER AND A ENERGY SUSPENSION ON THE DRIVER SIDE ...worked good no mods...wont know if they would fit wrong with the same motor mounts on both sides ....but motor sits nice low and far back 1/2 inch clearance from firewall
Staging Lane
Joined: Jan 2004
Posts: 82
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S&P LS1 Motor Mount Plates I just finished installing a LS1 in my 69 Camaro using S&P plates and they worked fine. I used stock 350 rubber motor mounts and the bolt holes lined up with no problem.
I've also ordered several parts from S&P and have found them to be a good Company to deal with up to this point.
I'm attaching a picture of the install.
Good luck,
Chuck
I've also ordered several parts from S&P and have found them to be a good Company to deal with up to this point.
I'm attaching a picture of the install.
Good luck,
Chuck
