Need to know tire size
I would suggest a 2,000. I need to know your tire size though. The only reason I don't say 3,000 is because you have not mentioned beefing up your drive. Also, you better have some serious v or z rated tires. Driving it home is a nice feeling rather than trying to load that onto something. Your time aint too bad, your truck is heavy.
As a personal favor though, try using a mixture of 3 gallons 93 or 94 octane with 2 gallons racing fuel.
Try to advance your timing about 5 degrees, these should help your time without a stall convertor. These are my opinions only.