Author Topic: SS350 with 255hp engine  (Read 3070 times)


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SS350 with 255hp engine
« on: July 22, 2006, 07:09:03 PM »
I have a 69SS with a 255hp 350. (interior code 714, paint code 76 B) The motor appears to be original to the car. The car has not been restored. A friend with several first gen cars told me that he once read that a small number of SS350 cars used the 255hp motor. The car was assembled in the 5th week of August. I am unable to read the partial VIN by the oil filter. Eventually I will pull the engine as I restore the car and then will know for sure. Does anyone have any information on this? Thanks in advance.


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Re: SS350 with 255hp engine
« Reply #1 on: July 22, 2006, 09:57:03 PM »
What you have is an LM1.

From the 1969 PAGEon the CRG site:

The LM1 moderate-compression 4-barrel carburetor 350ci engine was introduced at the beginning of the 1969 model year as the replacement for the L30 327/275HP engine. The LM1 was, in turn, replaced mid-way through the model year by the lower-performing L65 2-barrel carburetor 350ci engine, and most of the higher performance features of the LM1-equipped vehicles were not transferred to the L65 units. Even more so than with the L30/M20 in 1968, it was possible with the LM1 to create a SS-350 look-alike in most performance features. The absence of SS badges and SS hood/hinges, both easily added, are the only easily distinguishable clues between a L48-powered SS-350 and a LM1 with added J52 disc brakes, N10 dual exhaust, D90 stripe, one of the 70-series tire options, and the Z87 custom interior (which provides hood insulation). Closer examination of the original engine is required to note the lower compression heads, the distributor code, and/or the engine application code. The 7-inch SS wheels were also not available on the LM1/M20.


Ed "Bert" Bertrand
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Re: SS350 with 255hp engine
« Reply #2 on: August 01, 2006, 06:11:22 AM »
Try for more LM1 info.

But something's not right. LM1's were early cars. 714 interiors were late.

Can you post the tag info and engine code?
Kurt S