A new article with photos on the T/A & AAR rocker arms with a W2 / W5 rocker arm comparison

yr- just post the offset and not claim what they fit :)
FYI from YB by Scot Foxwell
Here's what I suspect: if you went from a 51 to 45, the throat may be too big already for the 45 and you have lost the valve job below the 45.
Biggest I will go on most 45* valve jobs is 91.5%, otherwise you lose the bottom angles, and from my experience, that's where the upper flow numbers are in the valve job; is in those bottom angles.
You need a good 60 (at least as wide as the top angle) under the 45 and a good 75 below that and if there is enough room, just touch an 82 on the bottom of that 75... but if the throat is too big, is no bueno.
I have 45* valve jobs that flow over 450 cfm (conventional 24* BB Chev) that give up very little over a 50* but kick it's butt in the lower lift ranges. "
end quote
I might consider 51 degrees with q 750 lift cam