71 442 4 speed values and opinions?
 

I just found what could be a great car and would love to hear opinions from the Olds and 442 experts as to the value. Found a 71 442, 4 speed CONVERTIBLE with factory A/c that I am not sure if it is original motor or not yet but it does have correct heads. The car is very orginal and in very good running condition and appears to have most of original body panels. Could use paint and some pretty minor rust repair since it is a southern car. One floor pan will need to be replaced. I know there were not many of these made with the 4 speed.

Love to hear opinions of values and also how can i be sure it was originally a 4 speed car if I do not have build sheet??