i am gonna go with forged internals and an upgraded valve train. i have a few questions for you guys who have expierance with turbo's in general and the sohc:
which block and head are best? iv herd the z6 block is better and the y8 head is better, but i have no expierance with either.
what kinda manifold is best for a dd? iv heard that the tubulars tend to last the longest, but again i'v never used one.
are they any advantages of an external wastgate?
who makes a good turbo cam?

any information and/or expierances would be appriciated.