I think 50 cc pumps would be overkill and if anything just be a bandaid fix...I had a 950HP that had 30 cc pumps front and rear and worked beautifully on a big block.
I completely agree with the squirters being way too small. Go to Holley's website and find out what came stock in that carb and start there...sounds like someone has frak'd with that thing way too much.