I recently picked up a 3b engine and 4 spd trans, I haven't seen it running and it has been sitting for quite a while. Im trying to fire it up out of the truck before doing the swap I have in mind. I have a starter that I know is in good working order because I took it off of a running and driving cruiser. All the vitals are there when I turn it over (fuel to the injectors etc..) and I am using a fully charged batter in another truck with the truck running but it seems like the rolling speed is too slow? what might cause this? thanks in advance.