the walbro fuel pump is an aftermarket high flowing fuel pump. if you now making 300hp you dont need it. Autoparts stores sell the whole fuel canistar, its take out the old one and drop in the new one. Wbodystore.com sells them for $160 with a 1 year warrenty. ive been running the NA one in my GT for the last 3-4 years with no problem, ive even done an l67 swap and still havent had any problems. they also sell just the pump for $80 and a high flow pump for $100. with the high flow pump you should do the fuel pump rewire about another $100 depending on where you get it.

W Body Store

^^i hope thats ok, sorry if it isnt.