Keep the Heater Box?

I used classic auto air and got everything in one kit. Heater box is smaller than original and fits fine just need a few holes in firewall. If you have dash out that is the time to install the heater box. Everything mounted, installed and connected fine. One A/C hose had the end on it clocked wrong but would have worked. I had it cut off and turned to the angle I thought it needed....Just me being picky. I ordered it during lunch one day and everything arrived the next day. My original heater box is in pieces and sitting on shelf in the shop with all the new parts to rebuild it. May never get to rebuilding it. lol. The A/C is always cold enough to freeze you out. Good luck on your project.