Mopar or No Car

I think partly to clear the valve cover/head for a larger diameter distributor cap. The pertronix distributor uses a larger diameter cap (than stock) and short shaft similar to stock length and you have to dent or grind a spot on the valve cover for it to fit on the big block.
Also, two different shaft lengths for B-Block vs RB- Block so maybe it is also for MSD to easily switch shafts depending on the application/order.

 

Agree, head/valve cover clearance.
Looks like quite the handful, small light car with BIG power!

 

I read a long time ago that Dick Landy lent a hand in the development of the dual plug 426 hemi heads.... I could be wrong on that.....

 

Adopted

 

Hmm, seems a bit too simple...but.

Thanks all.

Mike