[Fot] Rear engine seal on Spitfire

[f s]

Need some advice,

 I just put an engine together. 100% new seals and gaskets. Everything is
great accept the rear main seal is leaking alot. I have put alot of these
together and never had this problem before. I have taken it back apart and it
looks centered and no damage. I also made sure the all the bolts were good and
that areas that needed copper flat washers were correct. Any ideas from the
group? I am baffled and have a big mess. ;o(

Thanks