go see wayne at wpe (wacky performance engines) in croydon he got my last cvh to do 163bhp on twin dcnfs at nearly 8000rpm, it was wicked...

if it had 45 dcoes and a better exhaust sytem it would have seen 180+bhp and 8500rpm easily

so quick list
high comp pistons
steel rods
lightened and balanced bottom end with arp bolts and pocketed pistons or fit
high comp pistons /steel rods for reliablilty

phase 4 n/a cam
solid lifters
double valve springs
twin 40s
h&h ignition
head worked by wayne
and engine assembled and set up by wayne with a decent exhaust manifold and system should be around 150bhp but with steel internals and the comp ratio around 11.5.1 you could see around 160+bhp

or ported head, cvh33 kit, and twin 40s and 4-2-1 manifold will see a nice 130bhp and a decent dizzy from h&h will make all the difference