I too have been eye balling these heads in wonder. I reckon they are probably a bit better and way lighter than a gt40p head. But not AFR 185 or TFS170 good. For the price point I bet they are a great bang for the buck.
Aa for the China thing.. they've come a long way.. and American manufacturing has dropped the ball in a lot of ways
When I look at the specs between the 165-175 range heads, taking into account the size of the combustion chambers and such... I can't justify the amount of money that the rest are commanding. I mean, even the AFR 165 heads are a comparable price, and they seemed to perform really well on some dyno comparisons. BUT. To eek out just a teensie bit more airflow on a mild letter cam NA, I think I made a solid choice.
I'm going to pull the engine and transmission out of the car. At a minimum, new front and rear seals on the transmission, though I might open it up and j-mod it while I have it out and eyeballing it. The engine, I figure since I'm taking it out to I will lay my eyes on the bottom end. If I find something bad, I will really be surprised. I suspect this engine was rebuilt once. Maybe... but I can't be sure. There are signs here and there that someone was in it. Oil pressure has always been spot on. Temps always solid with no bad manners.
One of those boxes has a new high vol oil pump.
While I have not ordered any, if I can manage to tuck away a few hundred more, I'll get some roller rockers. Not planning on spinning this thing to the moon, so if I can't, then the original rockers should be fine. Only putting a E303 cam in it.
I did have one thought.
Anyone have any suggestions on fuel injectors? If I also manage to order some proper exhaust updates, then I'm pretty certain the OEM is gonna run more lean than I want. I'm not made of money... so when I put it back together, I intend to run it on the original computer for a while. If I can talk myself into another chunk of change, the computer will be next. No immediate plans to send this thing down a track. Just want a solid cruiser with some non-pedestrian curb appeal.