On the intake side of both heads (B heads , 66 toro ) there is the number 2.6 stamped there.Has there been some surfacing work done on these heads wih the number relating to the quantity of metal removed?? I see no similar numbers on the block side of the heads ??
Any thoughts ?
thanks
mike

 

Casting numbers are usually above the center 2 exhasut ports.

The numbers of "B" heads are 389395. But is there a drill spot too? Without the drill spot they are 45* heads, with the drill spot they are 39* heads. Both are/were 80cc

 

tx red. No I have that part of the issue you mentioned well under control. The number 2.6 is on the intake side of the head, 1/2 way along the head between the ports --maybe I will see if I can post a pic .I suspect ??? it may relate to some previous mill work --guess only ,thats why I ask.
cheers
mike

 

Are these raised cast numbers or stamped in?

 

joe,

they are stamped in --on the face of the head which meets the intake manifold
mike

 

The numbers I told you would be right where the head meets the exhaust manifold.

The only other casting I know of on Olds heads would be the "B" you were talking about already

 

The Chassis Service Manual shows that if oversize lifters were needed (due to production tolerances) when the engine was built, there was a stamping on the head in the location you've indicated.

 

the chassis manual indicates oversize lifter stamping is on the block's lifter boss.
stamping is pictured as a "O". the presence of an "O" indicates .010" o.s. lifter .



bill

 

Red,Joe,Bill,
Thanks guys .
sometimes an answer raises more questions. However, I will try n get a pic -may have to put carbon black in the stamping no`s to get no`s to stand out.
Seems the oversize lifter thing might be it .
Irrespective, I believe it may be more of a curiosity than a problem.
mike

 

Boy, memory is the second thing to go, and i can't remember the first...

 

I know about the drill spot on the raised rib near the oil filler tube; haven't seen drill marks on heads. However, B heads will only have 2.06" intake valves (vs. 2.0") if 442 or Toro and both came with 39 degree, .921 lifters.

 

hi run to rund ,
the engine in question is 30 mins away . when I get a moment I will have to get a pic. The numbers ,unlike B and the drill spot etc are not visible until the intake manifold is removed.

mike

 

Here is a pic of one of the heads showing the position of the stamped no`s 2.6. The numbers are next to the green pen tip . The no`s and position are the same on the other head -
mike

 

maybe this is better

 

I have a set of 1973 Ka 413191 cast and my heads have AX130 in the same place you are talking about so can any one figure that out the lifter size does not make sense for that many letters and numbers
well would likke to know any info

 

Redog, as Joe says, I think you're getting your info mixed up. The drill points are on the block, not the heads.