How fast do you want to go and how much work and money do you want to spend on the car?
How much does it weigh and how good is the chassis?
Many things to keep in mind when planning new race motors and cars
I have one high nickel Koleno 4.500 bore iron block in stock and it will get a Bryant 4.375 stroke old top fuel crank in it with BB Chevy rod journals and B1-MC heads ran N/A on E85 to try and run top Sportsman in NHRA I have a new KB RB aluminum block on order so I can use a old KB 4.500 stroke crankshaft that I have that could not be offset stroked so I will use it to build a motor around that crankshaft.
Stupid me, I know better than to do this type of build
I recently bought a used set of original B1 heads for this build so maybe it will turn it, the KB motor, into a pump gas motor