Looking for some advice on jet sizing- Thermoquad 6139

Did you read post #5?
100 sec jets is waaaaaaaaaaaaaaaay too small. Carter changed the size of the air bleeds in these carbs, which affects the jet size. The 6139 had the large 0.039" sec high speed bleed which requires larger fuel jets. Start with the suggested 137 sec jets.

As I said in post #5, jet size does not correlate to engine size. The 6488 TQ had a 143 sec jet, on a 360 engine. The 6410 TQ had a 125 sec jet on a 440.