I had fun gutting my car too. The weight of some of the parts is shocking. If you can't find the fastener holding something in, just rip it out, or use a sawz-all.

What are the plans for the car? Racing only, or will it still be street driven?

 

street but the occasional race. He wants about 600hp+.

 

But you're still taking out the dash? What about the carpet and such? If it were race only you have to make fewer sacrifices for comfort.