best heads
As far as the BBC aluminum Pro Comp heads, this sites ads are full of different vendors selling these and Patriot heads under different names even, some from $900 bare to $1900 CNC'd complete.
I question if they are any good at all for drag racing with roller cam springs??
They are Chinese castings with who knows what actual quality aluminum and hardness.
They appear to be a copy of the PRO ACTION/PRO TOPLINE/RHS 320 and 360 intake port size heads cast in New Zealand in a modern foundry.
They even show the exact same flow chart as the RHS heads. Coincidence or copy on this too? I question them being even close to those figures as cast.
I can see the intake port caving in with 250# seat pressure valve springs, an aggressive roller cam, and 7500 RPM.
Whats the facts on these heads other than they are $500-1000 cheaper than Dart Pro 1's, Brodix, AFR, RHS heads that are not in question as far as quality and long term investment?