with an EFI 5,8 engine it's more a matter of how much do you want it to put out?
As the saying goes cubic inches is almost as good as cubic dollars,
but there is no substitute for having both.
I would definatly build it on a later block so I could put a roller cam in it.
I am actually considering a 5.8 liter Ranger, but I was going to set mine up
strangely for a special purpose....Iw as going to buiild the engine for low
end and midrange torque and then gear the truck so can do 75-80mph
at or about 2000rpm.
the purpose? as an interstate cruiser.
Basically the engine needs to be big enough to just loaf along at 15% throttle.
a BIG engine just loafing alone "unstressed" is a time honored formula for efficiency.
You probably want it for other reasons.
AD