I have early 170 engine and late model 904. There is a fitment problem with converter hub. As the converter is custom piece (small diameter, high stall) I like to keep as is. So I have onlys choice to ask machinist to made my small register 170 crank to perfect fit.

I have found a machinist to do it.

I am pretty sure that has done before several times. I have calculated there is enough material to do it. Just to the inner hole to 1.81” and add an outer ring for flex plate centering (1.96”/2.16”)

Please advice me to topics where this is discussed before.

(I am overseas. Slant parts are not laying all around. Was a job to catch 170 bottom end which is not at biggest overbore and ”end”. Now I have a good project engine).

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1966 Dart. 170 cu.in. 200 rwhp.

Machine the counter-bore out to the larger size and use the early flex plate (small bore size) and everything works fine.
DD

Awesome mod Doc! Thanks for Sharing.

Greg

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http://www.youtube.com/hyperpack

Thanks!

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1966 Dart. 170 cu.in. 200 rwhp.

One more question. What is the needed size for re-machined counterbore? Is it 1.81" (46,0mm) or 1.815" (46,1mm)?

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1966 Dart. 170 cu.in. 200 rwhp.

1 13/16 inches = 1.8125
Best to measure the hub on the torque converter and add .002 for clearance.
DD