Need flathead info

[phat rat]

Just pulled the motor out of an F-5. Heads 8RT, would I be correct in figuring that designates truck heads? Any advantage to them as opposed to car heads? Block has A9012 cast in right rear, top of bellhousing mount. What does that mean? Thanks in advance for any info.

[BarryM]

http://www.vanpeltsales.com/FH_web/flathead_specs-90to125late.htm There are a few facts plus I can I can say I read that the aluminum front cover was put on Canadian engines and that the cast iron front covers came on American made motors. I also understand the aluminum cover  has 2 distributor shaft bearing surfaces and therefore more desireable. Don't know the difference or advantage to the RT heads, could indicate "factory relieving" but assume that would be the block. The pans are desireable that  had an inspection plate built in, usually in bigger trucks.  The F2 I aquired for parts had 8BA, so I assume the RT doesn't include pickups.

[phat rat]

Thanks for the reply. It's got the pan with the inspection plate in it.