I purchased my heads bare in 2008 and installed Engine Works 2.02 /1.6 Severe Duty valves +.100 and their SK945 spring kit and spring pad cups.Lapped the valves, set up at 1.85 with 10 degree retainers and locks.They have ran great on my 347 for 10 years with only one issue, I had to use adjustable guide plates to fix rocker alignment.No port work as cast 3300lb car 10.65-1 compression Comp solid flat tappet cam, Parker intake and 750 Mighty Demon runs 11.50's. I think the castings are good just use good parts and put the together yourself or have a shop do it. Also use antifreeze, distilled water with water pump lube just not pure water electrolysis is a killer.
Reason of review: Fair pricing.
I liked: Wide range of products at low prices.
I didn't like: Chance of getting a lemon.