While I was looking for photos or diagrams of the exhaust system and oil coolers on A-20's for the forum topic on P-70's, I found these rwo photo collections that have numerous detail photos that show almost all variants; especially useful are the close ups that show the different exhaust configurations fitted to A-20's that I hope will be useful for any of you considering a Boston/Havoc build. Downside for those of you across the pond, is most of the photos are USAAF aircraft- sorry!
Mike
http://axis-and-allies-paintworks.com/e107_plugins/forum/forum_viewtopic.php?13700
http://axis-and-allies-paintworks.com/e107_plugins/forum/forum_viewtopic.php?411
http://axis-and-allies-paintworks.com/e107_plugins/forum/forum_viewtopic.php?367