NCFJ
Supporting Vendor
How do you turn it by hand? At the fan?
Gabe, if you have to ask the above question you are not ready for a SBC.
In regard to the SBC, why 50 year old technology when LSX motors are a far superior choice? Sounds to me like you have someone trying to get you on the SBC band wagon.
Do yourself a big favor and read some 40 series swap threads. It creates a lot of issues you probably are not considering.