[Half-Inch Stud]

pretty sure the 1969 390 HP YK 428 HO with TH400 Class III hitch TOW Package in a Bonne Conv had 48 heads, and Long Branch Manifolds. 62's? i've never owned a set.
So, perhaps Pontiacs that were special-order got ...a premium engine combo?

Might even had the dual vac-pot distributor, but that could have been the 68 375 HP 428 HO with 16 Heads and Long Branch Manifolds, in a BONNE Conv, that had 3.42:1 Posi, and the dual Vac-pot distributor. But I digress.

[U47]

Originally Posted by Half-Inch Stud

pretty sure the 1969 390 HP YK 428 HO with TH400 Class III hitch TOW Package in a Bonne Conv had 48 heads, and Long Branch Manifolds. 62's? i've never owned a set.
So, perhaps Pontiacs that were special-order got ...a premium engine combo?

Might even had the dual vac-pot distributor, but that could have been the 68 375 HP 428 HO with 16 Heads and Long Branch Manifolds, in a BONNE Conv, that had 3.42:1 Posi, and the dual Vac-pot distributor. But I digress.

YK has # 16 heads.