318 Exhaust

Hey Gang!!!!! Help
Im upgrading my 1972 Plymouth Scamp with a 318.
The original Y pipe is about 1 3/4 to 2 the muffler shop says we need to chop the down pipe 6 inches from the flange and then connect a 2 1/4 pipe for the rest of the car.He says there is not a bender for the 1 3/4 pipe.
Does anyone make a down pipe in a 2 1/4 that i can replace the original ones with or maybe a y pipe i can cut to fit. I really dont want to go with headers. Please give me some input or pics of what the rest of the members have done. Or is the muffler shop just pulling my Leg!!!!