With the welding completed on the transmission subframe, I painted all the raw metal in there to protect against corrosion. Not that the car is going to see water, but it's a good idea anyway.
I changed the angle on the steering column to improve the position of the wheel.
I have the seat temporarily installed (it definitely has to come out again, because there is lots to do in the fuel tank and firewall areas). It looks like I have room to move it back about an inch without conflicting with anything. I've also started planning for bracketry to brace the back of the seat. I could probably get away without this on the street, but it's recommended by the seat manufacturer and required by a number of racing classes, so I may as well go ahead and do it now.
And I started fiddling with the position of the shifter on the console. I need to weld some steel to the edges of the shifter's baseplate, so I will have something to drill holes in for bolting to the frame of the tunnel.