Bought my 1990 ProV 2.6 liter carb new. 18 years later it still cranks and runs like brand new. The only thing I've done is run high quality Amsoil synthetic oil, ring free in gas till 96 then switched over to Seafoam (2oz per 10 gals). Just this year I replaced the fuel pumps and that's it. I will never own another brand motor.
The 2.6 liter carb engines are tried and true.