Street/Strip back to cruiser advice

I have ran a Thermoquad on my 340 for 15 years and if you have a good one there very hard to beat as a hot street carb on a small cube mopar the spread bore gives great low end and plenty of cfm for the top end. I run a 770 with jets from a 850 off a 400 big block ,I have ran the 850 with a 430 rear gear and it matched up nicely but with 355 or taller I prefer the 770