I have decided that the stock stamped rockers are not good enough for my build and want to use some roller tips like I did on my 350. The heads have a narrow slot for the pushrods. The cam is a MTC-1 low lift with new z28 valve springs. The pistons are .030 in the hole. The heads and block have been decked (0.017) and I used a .028 head gasket. Can I or should I use 1.6 rockers? Do I need to get self aligning rockers?