Right a bit of an update
My old engine blew up on Wednesday, the exhaust cam bolt cam lose and stopped spinning while the engine carried on moving so it went bang.
But anyway I finished my new engine and got it fitted
Engine removed

both old and new

So far I have done 70 miles and seems better but only getting to low revs ATM.
It's made the exhaust quiter and the over all power seems better
The final build was
Z22yh pistons and rods
Ported and polish head
Posted and polishes tb
Balancer shaft removal
2.4 inlet manifold
Full zorts
Piper cams
And just loads of new bits so pretty much all new bits