[Andy FIA]

Pete, unfortunately I have been in your position myself, my motor had no roller cam/lifters, incorrect pistons, zero piston to plug clearance, low compression, no thermostat, no dowels between the flywheel and pressure plate,etc etc.
You need to check everything on the motor to see if its correct, has it got the correct pistons, compression ratio, rods, cam etc. Has it been balanced, has the cam timing been set up etc, don't assume anything is correct until proved otherwise.
I just hope that you bought it on your credit card and not a bank transfer.

Good luck

Andy