I am sure you can, Ian. But I will make it easy for you. The amp is based on the JE Labs Hi Fi EL34 SE Stereo (
viewtopic.php?t=5662) but I used the 807 instead of the EL34. Please note that I split-railed the PS after the first filter cap for a choke followed by a 47 mfd/450vdc cap. The DPDT toggle switches the 807's vg2 (pin 2) between 100 ohms strapped to plate (for triode mode) and the screen grid tap of the JS6112 (UL mode). I was half expecting to fiddle with NFB for UL mode, but I was very pleased without it (and I felt lazy). Don't forget to parallel both sections of the 6SL7.
I almost went with Sun Audio circuit instead of the JE Labs since I love the 6SN7, but I am pretty pleased with how things turned out overall. You can't really go wrong with JE Labs circuits. I am now wiring up a Sun Audio SV-2A3 and later try the VT25 version, so the KT88/EL34/807 version will have to wait for now.
Hope this helps,
Min