Customs 53 ford, 239 flatty or 215 OHV 6?

Instead of the flush use this "Ford in a Ford" solution http://www.walmart.com/ip/Motorcraft-Motor-Oil-15W40-5qt/16940218 Higher detergent and higher ZDDP you'll clean it out and have the protection of extra zinc.

 

Nice! Thanks.

 

In 1959, I inherited my sister's 1953 customline , 215 six automatic. nice car, but when a friend beat me with his stock 1940 Ford sedan, I traded the '53 for a 1957 Merc monterey with the 368 turnpike cruiser engine. Put a 302 in it.LOL