351m

Sorry if this is ill placed or the wrong place to ask. But I am buying a 68 cougar and the gentleman is saying it came stock with a 351 cleveland. According to my knowledge and decoding the vin that was not a option. But not to say one was not put in there at some point, how can I identify the...

Hello, I had a 351M with a big bellhousing FMX Swapped the thing for a 302 so now i know i need a small bellhousing but jot sure in what flexplate and also which starter. I have both starters. The one from a t5-302 and the one from the 351m-fmx. Also the block is 71 so not sure if need...