yep i think it is a good 1 , with the big log intake and the hardened valve seals , and the bigg valve,s . i,m driving the same head with the carb from the old head , runnig good , and doing great gas mile,s ! did use the adapter that came with the d8 head for the carb !
you will noticed the update with the old head for sure , even better with a nice carb on it, before instal clean the inlet ports a bit and do a good polish job on the outlet and when possible a 3 angel valve job , when not then do a valve job [ setting them in ,minor hand job will do } so you now for sure there are not leaking ! only remember wat to use with the valve train , hydrolic or adjusteble . the new head is hydrolic , when putting it on a old engine , the valve train not hydrolic !!
there are lots of answhere,s on the forum about that , check it out , even the polish job is on the forum !