Like I said CobraR, every combination is different. The name of the game is experimentation; its the only way to learn. For his combo 19# definitely is out of the question and the 24# are probably stretched. If it takes 55psi of fuel pressure to max out the EGT in his combination (just for argument's sake) then I'd say he'd need to step up to 30#. If he can do it at 44psi fuel then he's OK. That's why I suggested borrowing a set of 30# and the MAF if he can manage.
Just as a suggestion, you might want to try 24# yourself. I'd say your MPH is a little low for your combination. If you could try 24# you might be able to pick up a bit. For comparison, with my GT-40 irons, E-cam and shorty headers I ran 12.50's all day at 107+ weighing in at more than 3300#. You ET isn't really that far off, but the MPH is showing that you're down a little on top end HP. The 1" space might account for some of it too though but I think I'd try some larger injectors.
Just some 'been there, done that'.
------------------
Jeff Chambers
T/S #3
11.86 Seconds/113.8 MPH
Chambers Racing Team