I'm new to AD trucks, BUT my buddy and I just pulled a 261 OUT of a 55 1st edition (it has been instaleld by the previous onwer), and you might be interested to know:

1. This 261 was front-mounted in my 55 1st edition

1. This 261 came with provisions for EITHER front or side mounts, and mmore experienced buddy tells me that is normal for that vintage of engine, as Chevy used both mounting systems simultaneously for a time.

Jim G