engine

Hi folks, I have a 1988 Catalina 20 mk2 with a universal Diesel M25. I have replaced with NEW the dip tube in the tank, the hose to the Racor the Racor and hose to the Electric lift pump and the pump and the hose to the engine. all are new. I also replaced the seal and filter on the 2ndary...

Acquired a C&C 26. Has vire7. Trashed from previous owner neglect due to illness, options try to rebuild it, replace with another rebuilt vire7, or put Yan Mar or other marine engine in boat. Any practical advice that is economical will be appreciated .