sad day...but i saw this coming. lol here is a list of what i have in mine and i HIGHLY recommend doing to yours, my motor should be 400-450whp all day long in my EF hatch with no sweat.
78mm JE pistions w/ optional ceramic coating 9:5:1 600$
JE rings (came with pistons)
78mm AEBS sleeves 400$ w/machine work
eagle H beam rods with ARP2000 rod bolts 350$ (have to shave girdle)
micro polished/balanced crankshaft 150$
Z6 head w/goodies
ARP head studs 100$


there are many different ways to go about this, lose ur HF manifold for starters, yea it's a way to budget boost but...a nice ebay stainless is 200$ if u want to go cheap, im running rc750cc injectors and highly recommend them, i will be selling them to upgrade to 1000's and i will hit you up when i do. you will need an aftermarket fuel rail unless you modify your z6 to flow hella more fuel like i did mine, i can do yours for 100$ but you'll need a much better FPR on the end of it, the best advice i can give, do it all right now, and do it right, i only have 3k in my y7 and EVERYTHING from the oil pan up is brand new from honda, pan,pump,pickup,waterpump,timing belt,tesnioner pulley, leave no stone unturned