Triumph Repair: 1975 Triumph TR6 Comression., vacuum leak, triumph tr6

Question
Hello. I recently purchased a used 75'Triumph TR6 with 84000 miles showing. I've done a compression test with all plugs out, coil wire removed, and throttle wide open. I cranked each cylinder about 6 times and results showed highest at 122 psi and lowest at 120 psi. The pressure in most cylinders increased over 3 cranks. What is the compression supposed to be and is this too low? All plugs showed normal wear and colour when I got it but #6 was oil fouled and the gap was plugged with material. I've since changed plugs to Champion Copper Plus RN12YC and found some oil on new #6 plug after short use.. The engine needs full choke to start, runs rough is is not able to run below 1000 rpm without stalling even when fully warmed. I know the carbs had been worked on by previous owner who had little skill. Any ideas on my next move? Thanks.

Answer
The compression figures are about what I've seen in my TR6.  Compression is more a go/no-go test tool; do you have enough compression to fire, in essence.

Oil fouling may be rings, but your compression test doesn't indicate this.  Are you sure it is oil and not wet from gas?

Another option is that the valve guide is worn, or, if fitted with oil stem seals, the seals are worn.

Since the engine is hard to start, and you have to choke it that much, I would check for
1) vacuum leak
2) float levels on the carbs