The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 47-55.1 Google search challenge for 178 tooth SBC external balanced flexplate

mr48chev · 03-19-2020, 03:33 AM

In the 48 years that I have actively been dealing with all sorts of Chevrolets I have never heard of a 178 tooth ring gear but did find just the ring gear advertised used on
ebay.

I don't know what the original application was but if it were me I'd get a quality external balanced 168 tooth flex plate and swap nose cones on the starter. You are using a GM starter an not one with the Mickey Mouse picture on it?

Endframe/ nose cone for the starter usually costs about 15 bucks new at the starter alternator shop.

The only thing I can think of is that possibly there was an odd ball application like a motor home chassis that ran a 400 Chevy back in the time frame that they were common in motor homes.

03-19-2020, 03:33 AM	#10
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,380	Re: Google search challenge for 178 tooth SBC external balanced flexplate In the 48 years that I have actively been dealing with all sorts of Chevrolets I have never heard of a 178 tooth ring gear but did find just the ring gear advertised used on ebay. I don't know what the original application was but if it were me I'd get a quality external balanced 168 tooth flex plate and swap nose cones on the starter. You are using a GM starter an not one with the Mickey Mouse picture on it? Endframe/ nose cone for the starter usually costs about 15 bucks new at the starter alternator shop. The only thing I can think of is that possibly there was an odd ball application like a motor home chassis that ran a 400 Chevy back in the time frame that they were common in motor homes. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. Last edited by mr48chev; 03-19-2020 at 04:52 AM.