360 Ford V8 & C6 in a Mach 1?

[360 Ford V8 & C6 in a Mach 1?]

I have this 69 Mach S code, but the engine is long gone. Assuming I use a 351W, what is the best tranny to use? It was originally a 4 speed stick but the last owner had an auto installed, and the shifter is still there. I don't have a preference either manual or auto, just want to get this thing on the road for little cost due to my minimal budget.

[360 Ford V8 & C6 in a Mach 1?]

I have a project car 69 Mach 1 S code with no engine. I have a 351W with no tranny and a 360 with a C6. All things being equal, which engine should I use for least cost. I have a very modest budget and I just want to get it running. Thanks!