heads - Ford Truck Enthusiasts Forums


Thread Tools Search this Thread
Old 03-21-2006, 09:59 PM
ol'blue52 ol'blue52 is offline
New User
Thread Starter
Join Date: Oct 2005
Posts: 18
ol'blue52 is starting off with a positive reputation.

I have aflathead V8 engine out of a 1950 (I believe) F-6. However it has one 8RT head (left) and one 8BA head (right). Looks like its always been that way. Is it possible this engine came this way or has one of the heads been changed? I noticed the intake manifold has both 8RT and 8BA stamped on it and some internal parts are marked 8BA like the rods. Also, does it hurt to run them mismatched or should they be the same?
Thanks for the help.

Last edited by ol'blue52; 03-21-2006 at 10:02 PM. Reason: Left out a question
Reply With Quote
Old 03-22-2006, 12:32 AM
mtflat mtflat is offline
Post Fiend
Join Date: Oct 1999
Location: Kalispell, MT
Posts: 5,329
mtflat has a good reputation on FTE.mtflat has a good reputation on FTE.mtflat has a good reputation on FTE.
8RT is the truck designation for the late variety flathead V8. The auto version was called the 8BA. Other than the cam (maybe) and heads the two are the same engine. As near as we have been able to tell the difference was bolt on accessories that made them truck or car engines....waterpumps, exhaust manifolds, oil filter canister location, more fan blades with wide belt pulleys, etc.

Looks like you have one of each head so your compression should be a bit goofy. 8RT heads are reported to be large chamber, thus lower compression than the 8BA.

Intake is the same for both, thus the 8BA/8RT casting number. Rods are all the same and if marked will probably be 8BA. Mix and match all you want - it's all the same stuff.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
239 Flathead for Sale -?Value 51F14ME 1948 - 1956 F1, F100 & Larger F-Series Trucks 8 04-21-2013 05:56 PM
Holley 94's: So many models, which is proper for me??? mercury_kid 1948 - 1956 F1, F100 & Larger F-Series Trucks 4 03-28-2009 10:52 PM
8CM vs. 8RT vs. 8BA heads - differences? Narwhal Flathead V8 & Flathead 6 3 01-04-2006 12:19 AM
Pulled the head - wrong one! Narwhal 1948 - 1956 F1, F100 & Larger F-Series Trucks 21 01-01-2006 03:46 PM
Difference between 8RT & 8BA heads loudfords Flathead V8 & Flathead 6 1 08-23-2004 03:32 PM

Go Back   Ford Truck Enthusiasts Forums > >

8ba, 8rt, casting, engine, flathead, ford, head, numbers

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -5. The time now is 05:15 AM.