Dowl Pins on block.....need em?

Well maybe some of u know i have been having problems with my car smoking and alittle lose of power

well someone said that it might be cause i dont have the dowl pins in the block

could that be a problem or is it casuing my problems. since i dont have them in is my head/block not sealing right or did ir shift or wwhat>

Or is it fine to rum w/o the dowlpins and its something else