Author Topic: Baseplate I.D.?  (Read 217 times)

Offline mcx

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Baseplate I.D.?
« on: May 11, 2020, 03:26:41 PM »
I picked up a 1973 Chevy 454 7043200 core in decent shape. I believe it has the wrong  base plate based on the idle air passage way does not align with the main body.  This base also has a unfamiliar fast idle screw compared to other 1973 Chevy Qjets. Anyone recognize to what this base belongs?? Thanks.

Offline Cliff Ruggles

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Re: Baseplate I.D.?
« Reply #1 on: May 12, 2020, 02:54:54 AM »
The baseplate change for those happened in 1973.  Up till 72 the Chevy divorced choke units used a different gasket between the main body and baseplate.  Most likely done to add the EGR port in the front but be aware that it's not uncommon to find where someone has installed an early baseplate on a later casting and it requires the earlier gasket.....

Offline Kenth

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Re: Baseplate I.D.?
« Reply #2 on: May 12, 2020, 03:19:55 AM »
Looks like a 1968-70 base plate.
These years an extra lever for Wide Open Kick shown on yours were used.
Also this is missing the EGR port used on all 1973 and on units.

Offline mcx

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Re: Baseplate I.D.?
« Reply #3 on: May 12, 2020, 04:49:53 AM »
Cliff and Ken, thank you very much for the replies...its good to know it can be made it work with the earlier gasket..i'll  look for a gasket with a oval shape to pick up both bypass holes on that side of the carb.....a small frankenstein but who is hooking EGR up on these anymore. LOL.   Mike.

Offline Cliff Ruggles

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Re: Baseplate I.D.?
« Reply #4 on: May 14, 2020, 04:47:06 AM »
If you order one of my kits I can substitute the correct gasket at no additional charge, do it all the time.....