W2 Stroker comin together!

Unless that carb was a recent ultra xp model the 950 is not really a 950. The new one are now being marketed as a true 950. 1.750
Venturi size. That could be why there was no difference.
A quick fuel Q-950, unless I am mistaken I believe the ultra HP Holley is essentially a copy of this carb. It has 1 3/4 venturi.