[Exil]

Anyone have a CAD or a diagram of the deck surface of our blocks? I need one with exact measurements for placing the bolt holes & dowel pins. I am having some bore plates cut for my own use out of T-6 aluminum.

If anyone would like their own let me know. The more I have done the lower the end cost will be.

[wreckmastr]

Like this one?
http://www.allpontiac.com/pontiactorque.html

[Exil]

Ya just not $550 for each one.

I can have upto 2" thick for about 100-150 each. So I will get two any bore I pick.

[Jack Gifford]

This originated from Cometic, but it's accurate. I could email a higher resolution copy if you can't read this.

[Exil]

Ok thanks Jack I just PM'ed you

[cdrookie]

i'd be interested in one in the $100-$150

[quick67bird]

I would be interested as well. None of the machine shops in my area have torque plates for a Pontiac.

[Graham355]

I can see everything except the cylinder bore positions on the drawing

[Jack Gifford]

Originally Posted by Graham355

... I can see everything except the cylinder bore positions on the drawing...

Another page.

[68hotbird]

I am interested in a plate to add to your number and lower your cost. Let me know what I need to do to get on board. Thanks, Paul.

[Exil]

Originally Posted by Jack Gifford

Another page.

Hey jack, is that a misprint on the last diagram for the dowel pin center bore to center pin side to side distance? Is it supposed to be different for each one? I would think it would be the same for each side? Aren't each a mirrored image of the other?

If it is a misprint which is correct 2.240 or 2.250 ?

[Jack Gifford]

I'm sorry to say- I don't know. Like you, I would have said that the layout is symmetrical end-to-end. And I don't know why I didn't pencil a question-mark by the 2.240/2.250 numbers.
I can try looking at my layout drawings for my DOHC baseplate, for any clues to the answer. I'll post what I find, if anything.

If I'd quit putting off buying a good 24" caliper, I could quickly answer! Unfortunately, the X-leadscrew on the table of my Chinese mill doesn't help- it can be off by close to .010" in 18" of travel.

[raginwarrior]

I would be interested in a torque plate also, if it can be produced for a 4.380" bore.

[Jack Gifford]

The drawings I did for my DOHC didn't help- I just referenced bore centers.

Measuring dowel pin centers on one of my M/T blocks indicates that the combination of 2.240" and 2.250" dimensions is closer than if they were both 2.240" or both 2.250". But that might be just that particular block, or my measuring inaccuracies.

[LPI]

X=9.180"
Y=1.285"
Ø = .308" (Wade at BOP Engineering has the correct dowel pins in stock)

[llwta76]

I hear aluminum isn't best for iron heads. Will you be doing any in steel or whatever? Larry

[hurryinhoosier62]

Larry, our 6.2/6.5 GM and 6BT Cummins torque plates were aluminum. Had no problems with deck surfaces or bores afterwards.

[llwta76]

I would also be interested in one! Thanks, Larry


( Thx for the comment Steve)

[hurryinhoosier62]

I'm definitely interested. It would beat having to send BHJ nearly $1,000 for a set.

[azbirds]

Wow, I didn't know these things are in such demand. My machinist didn't have one for a 4.35 bore so I made him one. IIRC the chunk of aluminum wasn't cheap.