L83 camshaft: Fuel pump eccentric?

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Jan 7, 2021 | 11:01 PM

69427

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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.

L83 camshaft: Fuel pump eccentric?

Just curious about the original engine from my '84. I pulled it out years ago and put it in a street rod pickup I'm building (got a 355 track engine in the '84). I'm going to run the pickup carbureted, and the fuel plumbing would be easier if I can use a mechanical fuel pump. So my question is, does the stock L83 cam have the common eccentric to operate the pump rod, or did Chevrolet save themselves a couple cents in manufacturing cost by not machining the pump lobe?

Thanks for any help.

Jan 7, 2021 | 11:20 PM

jazfe

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From: Vancouver Washington

Stick a pump rod in there and turn the motor over. You'll know soon enough.

Jan 7, 2021 | 11:37 PM

84 4+3

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Pretty sure mine had it.

Jan 7, 2021 | 11:40 PM

Patsgarage

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From the images I can find online it does have the eccentric on the cam, but as previously stated it is easy enough to check.

Jan 7, 2021 | 11:53 PM

84 4+3

Le Mans Master

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From: New Jersey

Quote:

Originally Posted by Patsgarage

From the images I can find online it does have the eccentric on the cam, but as previously stated it is easy enough to check.

Mines on the shelf in the garage still. I'm just cold and in bed and don't feel like walking down to double check. Chances are GM used the same cam in every variety 350 in 84 including those with carbs so...

Mar 13, 2021 | 06:51 PM

69427

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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.

Thanks for the input, guys. I'll assume the reasoning is accurate here, and I'll order up a rod and pump to try it out.

Thanks again.

Mar 13, 2021 | 11:10 PM

84 4+3

Le Mans Master

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Quote:

Originally Posted by 69427

Thanks for the input, guys. I'll assume the reasoning is accurate here, and I'll order up a rod and pump to try it out.

Thanks again.

I actually happened upon this photo. It is for certain there as it can be seen clearly as the top lobe lol. (That's my dumb *** looking at the old cam like... now what lol.)

Mar 14, 2021 | 09:05 AM

Bill Chase

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From: Buchanan, Michigan

many gm cars were still carbureted with ccc qjets through 84-87 so any factory sbc cams for the 305-350 still had fuel pump eccentrics on them. you'll be fine.