R3 block info

Thanks for the info everyone.I heard about the front cover but not that the cam cores are totally different.
Brett is fairly local to me but I never met him.I think he uses harshmans dyno and he's five minutes from me.
This block feels like it weights twice as much as a production block.

arrow made front timing covers for those. You see them around. Think i have seen a couple on here for sale actually at one time or another