yes.. it's a bit normal to have more drag on a new rebuilt engine than a sloppy worn out one.
did you use assy lube?
did you plastigauge it to make sure the crank and bearings are matched up and correct clearance.
ring end gap correct?
you can run it over a bit with plugs out to cut the 90-130 psi compression to help turning it over.. parallel up some bats to help.. if it is 6v jump it with 12v.
run it with plugs out till oil pressure comes up.. then put em in and jump with paralleled bats / 12v bat on the 6v starter, if it is 6.. etc..