Compulsive chicken choker
Well, looks like I might have messed up with the head gasket orientation.......
Yep, this is what I might have done, removing the heads is the only way to check.what can throw a chevy guy is when fitting head gaskets to a ford block one goes upside down. this is because both gaskets are the same and have big coolant holes at one end which go to the back of the block. so to get the big holes at the back on both 'banks' one gasket has to go on upside down. neil.
Not true. Ford head gaskets are different front and back (of the block) and when they are fitted correctly, you can see the corner of the gasket at the front with the engine still in the car. I have never heard of drilling holes on Fords, only when fitting non-400SBC heads to a 400SBC.removing the heads is the only way to check.