Studs will distort the deck or main caps different than bolts.the reason is they have fine threads on the top of the stud 7/16 x 14 in the block and 7/16 x 20 on the stud. the fine threads have more leverage than coarse threads in the block so the clamp load is higher than with a bolt at the same torque.if you check a main bearing bore with bolts then install studs you will see the distortion,same with the cylinder except the cylinder distorts more than the mains.Bill