I'm back!
1 7 13 19 27 6 12 16 22 26 32 are GND
3 DAC_D13, goes to RAMDAC pin 4
5 DAC_D15, goes to RAMDAC pin 13
9 DAC_D9, goes to RAMDAC pin 65
11 DAC_D8, goes to RAMDAC pin 64
21 DAC_D6, goes to RAMDAC pin 57
23 DAC_D4, goes to RAMDAC pin 55
25 DAC_D3, goes to RAMDAC pin 54
29 DAC_D0, goes to RAMDAC pin 51
2 DAC_D15, goes to RAMDAC pin 13
4 DAC_D14, goes to RAMDAC pin 12
8 DAC_D11, goes to RAMDAC pin 67
10 DAC_D10, goes to RAMDAC pin 66
14 DAC_D7, goes to RAMDAC pin 58
24 DAC_D5, goes to RAMDAC pin 56
28 DAC_D2, goes to RAMDAC pin 53
30 DAC_D1 goes to RAMDAC pin 52
31 FBI_HSYNC goes to 74XX244 (or eq) pin 17
33 FBI_VSYNC goes to 74XX244 (or eq) pin 15
DAC_D0 to DAC_D15 and the SYNC signals are not that important, SLI will work, but the image will be corrupted.
The following pins are important:
15 FBI_CLK2X_OUT goes to FBI pin 201, either directly or through a 22-47 ohm resistor
17 SLI_SYNCIN goes to FBI pin 185, either directly or through a 22-47 ohm resistor
18 SLI_SYNCOUT goes to FBI pin 186, either directly or through a 22-47 ohm resistor
20 FBI_CLK1X_OUT goes to FBI pin 214, either directly or through a 22-47 ohm resistor
34 PCI_FIFO_STALL goes to FBI pin 184, either directly or through a 22-47 ohm resistor
The RAMDAC is the GENDAC or TI equivalent IC near the VGA connector.
The 74XX244 or eq IC is between the RAMDAC and the FBI.
The FBI is the big 3dfx IC near the PCI connector.
Edit:
Regarding video quality, it's possible to improve that, but I'd need some high res pictures of the VGA area if I don't find a PV830 in my Voodoo 2 stash.