Ok ...
Had some hassle trying to upload the files earlier but now have images of a four page article on a 302 clevor build in my gallery
This is medium size image and the full size images (4 of) can be got in my gallery
I also found the pages on head flow numbers as provided by various sources at different times:
http://fordmustangcar.com/repair-and...head-flow-data
the pages list various cleveland/windsor head flow rates.
Interesting to note that the GT40 '60's original heads and the much later GT40Ps flow very similarly to the 2V Clevo heads - Aussie/Non-Aussie 2V heads appear to have practically the same flow
(removing the incentive to do a street boss for most I imagine)
Quick lift from the pages - Taking .500 lift as an example:
Head Casting I/E Valve
Size Lift 0.500 Port Configuration
GT40 (60s Orig) I 1.90 195.4 NOS Stock Ports
GT40 (60s Orig) E 1.60 151.8 NOS Stock Ports
GT-40P Cast Iron I 1.84 196.0 Stock
GT-40P Cast Iron E 1.46 139.0 Stock
Aussie Cleveland 2V I 2.19 198.0 Stock
Aussie Cleveland 2V E 1.71 162.0 Stock
The numbers tend to vary over time and with the source (like dynos) but they're all pretty close.
It is worth noting what a bit of porting will do to the 2v Clevo heads
from
www.powerheads.com
Anyway - that's about all I have to offer on the subject other than - good luck.
LoBelly