Reverse Cooling?

[Shannen Durphey]

Dave Williams wrote:
> 
> -> GM went to it earlier than the LT1.  If you look at late 80's IROC's
> -> TA's and vettes they should all be reverse flowed.
> 
>  '55-'58 Pontiac V8s were reverse flow.  Chevrolet only did the LT1 and
> its variants.  The motors you're talking about were L98 type and had
> conventional cooling no different from the '55 265 Chevy.

Any external tell-tales?  Friend's got a 55 Pontiac w/V8 to look at. 
True for Jimmy's, also (they used the Poncho engine)?
Shannen