iv got two blocks sitting in the shed, one has Q stamp on each of the main caps other block has F stamp on the main caps, could this mean one of the isnt a turbo block? or is it like that on eack rst efi block?
cheers andy

 

I dont know the answer mate but I do know it's fine to use a NA block or a turbo block, i'm using a NA block and just drilled the oil return hole.
I went this route because NA blocks with good bores are easier to find and will never have seen the sort of temps that a turbo block has and so have a better chance of not cracking and lasting longer

 

very true, another thing is can i use my standard grind crank in a another block? that doesnt need boring?

 

I wouldn't use another crank in there personally unless the block had been line-bored.