This is a little late but all the options sound fine and just pick one. I've had a 544 as a wintercar in Buffalo for 17 years and have been through it all. I started with a B16 and a single Zenith 6V and have gone through just about every configuration I can think of. Last year I was committed to making the Weber work. The one thing I had was a Manual choke on my DGV 32/36. Good economy and fine winter starting but poor power until the stomp. I never did hook up the plumbing (hot water) and I drove it hard throughout the winter. I'd try dropping the electrical choke and getting a universal choke cable and going manual. Changing the timing works but it masks the problem and addresses the symptom. I had to re-jet the Weber for the B20 and it worked great (except it was still a Weber and progressive) but well tuned SU's just work better throughout the driving range.