69 camaro sx fuel pump help
 

hi, long time 69 camaro owner here, bought in 1997. sadly it has sat for the last 7 years in my garage acting as a shelf. i am resurrecting it! i put a model 18201 sx fuel pump on it years ago which worked great. it has sat and i think the pump has varnished up. i thought about shooting some carb cleaner down it each end. has anyone ever taken one apart themselves? also posting another thread for additional questions.
https://cimg4.ibsrv.net/gimg/camarof...4f083c66d1.jpg
https://cimg5.ibsrv.net/gimg/camarof...884683eacc.jpg