Originally Posted by norcalsmoka

slightly higher compression pistons, lighter connecting rods and the stock ITR's crankshaft was made wtih some kind of heavy duty steel and was also semi balanced. The b18c1 isn't a terrible block, it came with oil squirters to cool down the pistons and a block girdle. If you can find a cheap c5 block go with that, but a c1 is fine and is gonna be cheaper.