Wanted to know if anyone has pics or knows how to join a rear midened chassis to the rest.

You midengined chassis is basically a subframe, I would bush it with resilliant bushes and bolt it to the body/rest of chassis using prefabbed brackets. This will reduce vibration and make maintenance a lot easier.

Does your barchetta have a separate chassis? If it does, it would make it even simpler (less complicated!!)

I am basically thinking of using the rollcage as the main frame, being it one long tube going all the way to the A frame area. The engine and gearbox plus wishbones would be connected to as you say subframe. Not sur eweather it is worth building a front subframe as the car is very short.

Rollcage would be... sufficient... but a backbone and rollcage would be a lot stronger.

Where is your gas tank and radiator going to go?

How would you attach your front suspension without a subframe, or are you talking about having front frame and mid frame be one piece?

Are you going to go racing?

-MR

yep both front and mid one piece. Tank up front and rad behind like the audi rally from the 80s.

So, why would you need or even want a front subframe?

The fewer pieces you have, the fewer there are to break.

-MR