[CMansfield]

The Edelbrock Victors are being installed on my recently ordered 351W Stroker being prepared by Bob Olthoff, He is The Superformance dealer for the South East. They are located near Salisbury NC (down near all those Nascar guys). I am not familiar with all the differences, I aksed for strong performance (he said to expect about 30hp and 20ft/lbs over the GT-40X heads Which I think are stock on the 351W stroker (392) ford crate engine) and reliability, Bob Doesn't like to see his cars come back and I trust him. He or Dennis might be able to address your specific questions. You could also give the guys down at Southern Automotive a call, while they routinely build BBs, they seemed very knowledgable on the phone.
Good Luck,
Chas