If you are going to get a 155lph...then you might as well get a 190lph one. And you don't really need 24lb. injectors with the set up you have. You are still running stock cam and cylinder heads...the 24lb. injectors would do nothing for you until you finish out the "entire package"...heads/cam/intake. Even then, many people run the 19lb. injectors with h/c/i. 88workcar mentioned in the other post "24# injectors"...that the 19s are good up to around 400hp. I've heard they are good up to 320-350hp. Either way...you don't need the bigger injectors...yet.
