Thread: vacuum lines
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Old 06-17-2011, 03:58 PM   #13
motornut
78K & 79C Jimmys
 
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Location: Ottawa Ont CANADA
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Re: vacuum lines

Quote:
Originally Posted by hensonjd View Post
It is the original 454 cam. So i screw them in till they touch and then back them out one and a half turns. it had a crane cam towing cam put in it.
i think you ment original carb?
yes to the screws
ah that might be part of the prob can you find out the type
the timing dosn't stay factory after a cam change
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1978 GMCJimmy4X4-350/203
1979 GMCJimmy4X2-305/350
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