Originally Posted by rangcrx

you do and it is worth it,you only need to shave down the 1 and 4th oiljet bolt about 1mm not much you can KEEP the jets in there..buy some arp rod bolts part # 208-6001 and use pr3 pistons do to no machineing work to the rods are needed they just press in perfect then your good to go.and with a nice itr cam you can rev to your 8000-8500 problem free as long and the block is bult right and bearings are checked