Yeah it is a Poncho intake, not a 351C based intake. I have Blue thunder high riser heads, so have a little more room to play with the adapter, lots of machining on both. I am still running 10.5 tires, they are a W though. It is about as big as I can go the way it is. I narrowed the rear a bit and "mini tubbed" it. I still have the rear seat and full interior though. The wheels are 12" wide.
On getting rid of the big wheelies it is kind of weird, but makes sense I guess... I changed the cam and got rid of too much torque! Went with more duration and changed the rpm band. Kind of slowed it down a tick originally, but I was running it the same to begin with. I have been launching it higher and higher and turning more rpm now and it has been going quicker and a little more MPH in similar air. And at the same time not so violent off the line.