Should it be possible??
273, 2bbl version, has "low" compression,
of 8:8 to 1 when new. It also is Only 273, cubic inches,
and with 8 cylinders, each bore is small.
A 302 ford will not be as easy, to hand turn over,
unless its needs rings.
I can turn over my fresh rebuilt 318 that same way,
with the solid fan, but not near as easy,
as with my tired 273 2bbl.
Prob be a good idea to pull all the plugs,
and do a compression test.
Does the car run ok? :)