cross flow motor ?
as i understand it the use of the 200 rods with a 250 stroke requires the use of low comp height pistons - 1.169" - whereas the std compression height of all the ford sixes is 1.52".
the diff being taken up by using a longer rod
ACl are the only ones i know that make a piston with this low comp height - and its an aust ( Nz?) ford six only application
all of which limits the available choices.
so i guess if you are after something different the only other choice would be custom pistons - which would make the acl 's seem cheap by comparison .
plenty of speedway people use these acl pistons - so my guess is there's nothing wrong with em .
maybe a bit of a non answer but dont think you could go wrong with the acls
- is it a street motor ?
did you check acl's website ? - says they are cast.
http://www.aclperformance.com.au/6MKRY9412.htm
also says they dont make the flat top any more.
i beleive a set at trade price is about $500 and retail $750
acl also do custom forged $$$$$
brett