Hi, Providing you’re positive the 50oz balance is correct (81’H.O.) and have the C-4’s Torque Converter, the 157 tooth flex-plates use a 10.5" TC bolt pattern, while the 164 tooth uses an 11- 7/16" TC bolt pattern.
Large Bell: 164, small Bell: 157. Depends on which Vehicle they were used in.
Those 146 tooth Flexplate’s were used in later, smaller Cars like the Pinto, Mustang II, Maverick.
Hope that helps!
Summit sells a large selection for the C4 / C-4 using either the 157 or 164 tooth flexplate with 50-Oz external balance depending on which bellhousing your transmission has.
Thank you for feed back car runs great. Can anyone tell where I can buy a kick down cable or rod for 1971 mustang c4 302. Would like to have original if possible
Thanks
Hi, Glad to hear your up & running! CJ Ponyparts has a lot of the late 60’s, early 70’s C4 parts,. Jeg’s, Summit. NOS..idk. SwapMeet, Some highly trusted EB sellers..
.good luck!
John