before i buy my afr heads i wanted to know what the difference between these afr heads

http://store.summitracing.com/partd...15&autoview=sku


and the ebay one

http://cgi.ebay.com/ebaymotors/AFR-...sQ5fAccessories

i wanted the 65cc version that will fit on my 1993 4 bolt main 355 chevy Gen 1 engine.... here is the engine block code if it helps... 14093638

now the ones on ebay say that they are cnc ported and flow better than the old 180cc heads and flow like the 195 i think..... which ones should i go for.. the ebay ones say that it will take anywhere from 4 to 8 weeks to build.... .


i will be using my ported slp/edlebrock tpi intake with these heads....


they got several versions

AFR# 0911 - 180cc CNC Ported w/parts Straight Plug, 75cc
AFR# 0916 - 180cc CNC Ported w/parts Straight Plug, 65cc
AFR# 0917 - 180cc CNC Ported w/parts Angle Plug, 75cc
AFR# 0918 - 180cc CNC Ported w/parts Angle Plug, 65cc
AFR# 0912 - 180cc CNC Ported w/parts Vortec Plug, 65cc
AFR# 0919 - 180cc CNC Ported w/parts Angle Plug, 2 center intake bolts at 72º angle, 65cc

which ones do i go with... thanks in advance...

 

I would go with the 0918 heads. The angle plugs will clear more header types. I see no difference between the Summit and Ebay heads. The difference would be in such things as the return policy.