i like the 305 as much as a 350 to be honest my 305ho in my 86 monte carlo ss has been a super motor, and would run, but it has almost 190,000 on it now and gettng tired but don't use 1 ounce of oil between changes and i have never had the valve covers off since i had it just put a new intake gasket and rebuilt the carb, i bought it with 86 or 89,000 on it
and gets sweet gas mileage