How much do you think this exhaust system will cost?

i have a 1985 camaro with shorty headers. right now its a 2 into one but i wanna make it a true duel. i want to run pipes off the headers and then into cherry bomb 8 inch glass packs then have turn downs coming out infront of the rear wheels. about how much would it cost installed and how much would it be to get the piping bent. its 2.5 inch pipe. and the 8 inch glass packs are 33 dollars each id need two so thats 66 dollars so far.