351w
Which ones switch from the one piece rear main seal to the two piece rear main seal....
I guess the crank is different, is anything else diffenct ie: flywheel, clutch???
The 351W was not put in 73-79 trucks.,
Please see the V-90* (small block) forum for 351W topics.
https://www.ford-trucks.com/forums/forum55/
Last edited by Mil1ion; Jul 15, 2007 at 02:48 PM.



