Nice to see a reply like this and shows the 70's aren't far behind in spool over the 60's!

 

not that far behind, but it is still a significant amount. for one just driving around, the 350rpms spool difference could really affect the converter characteristics.

also, the 60s will make 1200 in twin config, the 70s will do 1500 or so, for most twin builds, the 60s would be the better choice.

im putting the 60s on a 6.0 and will see where they start to spool. should be FUN