Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
Microsoft MSN, Live, Hotmail, Outlook email users may not be receiving emails. We are working to resolve this issue. Please add support@steelsoldiers.com to your trusted contacts.
Whether it is a 250 or a 475 has nothing to do with physical dimensions externally. They are all 855 cu in. engines. Same block, heads and manifoilds etc.