You can see retail pics of the complete heads here, asking Aus $5,900 :
http://www.triumphroverspares.com.au...&productid=766

page 13 in the TA catalog:
http://taperformance.com/PDF/TAPerformance_Catalog.pdf


TA is offering everything from practically raw castings ( $1500 ) to assembled ( $2795 ).

Valves are at 13° so they are on the centerline and you can fit up to 2.02" int and 1.60" exh.