565--See about going through an All-ATPs type program and it will do a few things for you--I was in a similar boat--I had 1200 hrs FW (T-37) but 2000 or so RW when I got my ATP--They gave me enough hours that I felt comfortable going into the checkride--even with the majority of RW time, and they removed my CL restriction that the Tweet has during the checkride--which was nice...The actual FAR requirements aren't terribly egregious as Grumble pointed out.. Another thing to consider (I am looking at this route to get my SE ratings)--Look at getting an ATP for Rotary wing--then you may be able to add on a ME and SE rating, by training to proficiency, rather than meeting a bunch of legal hourly requirements--I am not terribly familiar with this route--but a full-time DE, or IP should be able to get you a real answer on this...