Ok, shoot me straight Oppo, how bad of an idea is this?

My initial searching for a replacement for the RallyMetro has led me to some all over the map choices. I’ve decided to focus on ‘94 and earlier vehicles. These will be eligible for AV plates at the start of the year, which are $6/year instead of $101/year. Additionally, my state only tests OBD1 vehicles for emissions, so I wouldn’t need to worry about that.

My search has yielded some decent 80's to early 90's hardware, but has also led me to a couple of properly vintage vehicles. Which leads me to the question, how bad of an idea is this:

Or this:

I think a rally MGB GT or a rally Corvair would be really bad ass! Although I'd hate to ruin them, and I wonder how fragile they'd be.