Thanks for all of the input! Sorry for the delay in responding.

My car is not a big Packard, It is the smallest model that they made. 1937 was the first year for this model. it currently has the stock 100 hp inline six under the hood and rides on a 115" wheelbase. I am looking into possibly staying with an inline 6, maybe the 4.2 liter from the trailblazer/envoy. I have found some swap info on the inliners international forum. But I am also looking into other options.

Thanks, Jim