Gen 3 v8 Lifter Bank Angle?

According to classicoldsmobile.com

"Oldsmobile engines from 1964 onward originally used a 45 degree cam bank angle (CBA). This angle is formed by the intersection between the cam centerline and perpendicular lifter centerline. By 1968, all Olds engines were using a 39 degree CBA. In the years between, 39 degrees was used mainly on blocks found in Toronado's, and 45 degrees was being used everywhere else. The CBA also affects the pushrod hole angle in the heads.

45 degree blocks used 45 degree heads and the same for 39 degree blocks and heads. If swapping heads between 45 and 39 degree blocks, you must watch for pushrod interference at the bottom of the head. To put 45 degree heads on a (455) 39 degree block, you have to bore the push rod holes to .562" i.d. Applies to "A" heads and some "B" heads.

Angle  Lifter  Notes
 45    0.842"  All 330's.
               Non-Toro D-block 425's, B-block 400? ['65 442].
 39    0.921"  E and G block 400's, '66-7 Toronado 425's. Some '66-7
               non-Toro blocks. Late 307's?
 39    0.842"  Most Olds engines 1968 and up. [exception: late 307's?]

There's 2 kinds of 425's: Toro and Non-Toro. There's a BIG SIGNIFICANT difference:

• The Toro 425's use .921" lifters on a so-called '39 degree' bank angle.
  
• The other 425's have the common .842" lifters on the rarer 45 degree angle, as do the 330 engines.
  
• 68-up engines are ALMOST entirely .842" lifters on 39 degrees. The only difference this might make is:
  
• .921 lifters are more expensive- like $100 vs. $35 for .842" units, per set.
  
• 45 degree cams can be more difficult to find, but any REPUTABLE supplier can supply the grind you want in the configuration you need [Mondello, Dave Smith, etc.]"