350/x

Hey there

I just found a 1970 Buick Skylark 4 door in the local yard here and the engine is confusing me a little.

On the back of the intake it has 350/x cast into the back of the intake.
The casting numbers say it is a 1970 350 but I have never seen one with the x cast next to it.

Is this an experimental intake?
or was this a high performance 4 door?

#s match the vin SP block


Thanks for looking
speedygump

 

Any pictures?

:kodak:

 

I'm with you, confused and never saw one either. The SP is the high comp 315 HP engine. That's pretty rare to see in a lark.

 

Perhaps the car needed extra horsepower for towing a trailer?

 

Very interesting? For sure the desirable SP code 315 hp engine, and who knows maybe there was an experimental 350 that slipped out... Either way it was a sleeper 4 door!!

 

Not THAT unusual. Found one just like that in a yard about 25 years ago. Had the complete guage package AND the 24 clock. Don't remember about the intake though.

 

I can't seem to post a picture so send me your Email address And I will send you a pic.


SpeedyGump

 

Here is another thread involving an X marked manifold:

http://www.v8buick.com/showthread.php?t=58188&highlight=experimental+manifold

 

Does anyone else have an intake like this?

This is the first one I have seen with the X on it!