Howdy Ak:
Super goal. I love the old dirt track Ts. The side drafts will have a high coolness factor and will fit inside the hood. The reason dirt trackers had hoods was to help keep the dirt out. The 6 into 1 exhaust pipe will be a killer. SUPER!!
IF you have a chassis take some measurements of it and the 300, height and length, you are considering. IF they fit together and if it can take the extra weight, go for it. 300s have some aftermarket intake manifolds that will make carb mounting a little easier. It will appear taller in a track T, kinda like the track Ts with a GMC inline. But fitting it inside a hood may be a challenge. A 200 will be a tighter package similar to the trackers with old flathead V8-60s and Offys.
Do you have a chassis?
Adios, David