Well im new to the form..but here what i have.. 1966 mustang convertible base model. 3 speed with 289. Father in law gave it to us.. he has owned for the past 35 yrs.. sat in garage for most of its life.. not being drove.. The problem is now.. i think he never change the oil in the last ten yrs.. the heads show it.. so hear is the deli-ma .. don't have the funds to complete build back original .. so we decided to pull parts off the 331 stroker i have.. so now here what we putting in.. 289 block, crank, stock pistons, from 331 512 lift cam, set of ford turbo swirl heads, intake and four barrel carb. and yes all the other small stuff new to. now the question is going to work.?? or is going to cause more problems??