I am looking for a new flexplate (old one's missing teeth)
I have a 1966 LeMans but a 66 389 GTO engine installed. Trans is a TH400.
Looking a the dimesnions this plate should be the right fit:
https://www.summitracing.com/parts/pqx-1845501
https://store.prw-usa.com/1845501-po...nce-166-teeth/
What confuses me is that it says "67-79" - can anybody explain that? Did something change on the crankshaft between 66 and 67? Why wouldn't that plate fit on a '66?
I can hardly find anything on crank bolt patterns on Pontiac crankshafts so I assume that pattern never changed?
The dimensions I measured on my engine are:
crank register: 2.75''
crank bolt pattern: 3.79''
converter pattern: 10.75''
166 teeth
Thanks!
TJ