MSD Trigger Wheel Dimension

[Kurshuk]

Need some help and searches have not provided the answer...

MSD Chevy crank trigger wheel center diameter dimension question, do both the 7" sbc and the 8" bbc wheels have the same center hub diameter? I have an old 7" sbc msd trigger wheel and I know the center is smaller on that one, but I am fairly certain that they changed this and made the centers larger.

MSD/Holley web sight was no help. This is for a sbc crank with bbc snout and 7" ATI damper for sbc w/bbc snout.

Any insight would be appreciated! Thanks!

[superpursuit]

Wouldn't it be better to go straight to the source and call MSD and ask them?

[Kurshuk]

That would be an option for tomorrow morning, and I will do that. Was hoping that someone here had the answer. These things keep me awake at night!

You would think that information would be readily available on their web site!

[Kurshuk]

Called MSD...

Both the small block 7" trigger wheel and the 8" bbc trigger wheel have the same inner diameter. Another thing to note... The 7" Trigger Wheel is 1/4" thick and the 8" Trigger Wheel is 3/8" thick. something to consider for critical pulley alignment!

Just thought I would update this post as a PSA for those that tried web searches to find these answers!

Tom