[Healeys] Engine help

[John Roesle]

Ladies and Gentlemen,
 
Need some technical information.  I have purchased a
1957 BN4 Longbridge 100 6 with the 2 port head.  I have the head and manifolds
from a 3000 that I want to transplant.  
1)  Will the rocker assembly transfer
to the new head?
2)  Do I need to get a different cam to account for the new
valves?
3)  Can I overbore this block to 2912cc without issue?
4)  What else
do I need to know to make this work?
 
Thanks

John Roesle
Shawnee, KS. 66227
913-687-1654
lostboys65 at yahoo.com