Vote for The Forward Look Network on the Mopar Top 100 Sites 

'73 last year for Class A Motorhome 413

From: Daven Anderson
Remote Name:
Date: December 05, 2002
Time: 00:41:01


The Class A motorhome chassis (26 ft.+) engine was 413 ci. through 1973, then 440 ci. until 1980. The Class A motorhome engines are unique in that the head and block have an extra water cooling passage. You can use standard heads with the motorhome block (& vice versa) but that would block the extra water passage. The Class A heads use RV12 spark plugs instead of R12. My 1974 Class A engine has a forged crank, whereas almost all other 1974 440's have a cast crank. Those forged cranks were last forged in 1973,but the leftover stock was used in 1974 truck/industrial RB engines.


Last changed: July 19, 2018