So will the crank and rods fit...before i start to put everything together.

 

The 99mm pistons will fit once you bore your stock block out to match them, Your stock bore is 96mm if I remember right...

The 4" stroker crank will fit as long as the pistons you got are made for a stroker, or you use shorter than stock rods. If you tried to use stock 5.7 pistons that are made for a 3.622 stroke crank (I believe that's the stock stroke) with the 4" stroke crank, your pistons would pop out of the block at the top of the stroke.