Thread: Gas Milage Fix on my Chevy 350 and cold stall issue

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Originally Posted by Zombiebrew

I CAN'T FIND THE DATE STAMP ON THE ENGINE!!!! The block number is 3970010 so it's 69-79. But i have no idea what year the block is. I know it's got the smaller spark plugs "peanut plugs" so that means it must be post 1970? Doesn't really narrow it down.

I always get a chuckle out of you guys who assume that everything has been kept together through decades of trading, buying and selling. The only way you can know that every part started life together at the factory is to buy directly from the factory and never let the motor out of your sight. The peanut plug heads may or may not be original to the block. Take everything you have as a free-standing part on its own and you will be better off.

And I don't understand the obsession with knowing what year the block was manufactured. What difference does it make? If the block hasn't been decked, the suffix may still be visible on the passenger side block deck just in front of where the head would end. Sometimes it is hidden behind an alternator or other add-on.

Originally Posted by Zombiebrew

Also while i'm at it the engines been acting a bit wierd. When i cold start it i need to keep my foot on the gas and feed it up to 800-1000 rmps for a min or two or else it stalls........anybody have any ideas? I just put new plugs in (did it myslef! AC Delco)

I would purchase a rebuilt Quadrajet from Summit or Jegs, complete with warranty. At the top of my list for buying or having a Quadrajet rebuilt would be Cliff Ruggles, but I understand he has a one year waiting list.
Cliffs High Performance Quadrajets :: Qjet Carburetor Rebuild Kits, Parts, Quadrajet Rebuilding, Quadrajet Parts, Bushing Kits, Carb Tuning

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