I would think this is essentially #48(1969) heads that were used on the 1969-350HO;
ensure clearance for valves;
IIRC those 1969-350HO short blocks had valve reliefs in the pistons, and notches at the tops of the bores for intake valve clearance.
The large valve "72cc" D-port heads were essentially carried over for four model years with small changes (including id numbers);
1967 = 670
1968 = 31
1968 = 16*
1969 = 48
1970 = 12
* = I could be mistaken, these may have been more akin to 80cc like the 1969 #62 and 1970 #13 castings
__________________
1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.
1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
|