Might have just ordered:
Mahle Motorsport 83mm 21mm pinned pistons
DM Forged 21mm pinned rods
APR head and main studs
Full Supertech valvetrain
Spare head will be dropped off with JNL Racing for an extra special porting job.
Then I'm stuck between going for an HTA3079, or a GTX3576. The engine that I'm going to build will flow too much for a GTX3071 with the porting work. Head will be specifically flowed to suit either the HTA or the GTX. HTA will push 500 at low boost and the GTX 550 at low boost.
Stage 1 of the new exhaust system is here, a nice 3.5" BCS downpipe.