Bike parts

I got all the parts to rebuild my bike thursday, I put the piston together and installed it, and slid on the new cyl block and found the difference between 05-06 cyl blocks and 03-04 cyl blocks, oil squirter relief's cut into the block, the 03 doesnt have em so it hits the squirters and wont sit flush, so i will have to get that machined before i can go any farther, yeah well, gives me more time to help out with getting the rusty going..