drill depth on crankshaft for 383/440 for input shaft

[67Vette427]

JUst finished up the new 383 for the Cuda and I need to drill the crank since it had an automatic behind it in its original life. A couple questions:

How deep does the hole need to be?

Is it safe to drill out the crank or should I notch off the tip on the input shaft?

Any other ideas or comments?

I have the pilt bearing in and I mated it once already but the bellhousing wouldn't seal so I pulled it out again and noticed the shaft had marked on the inside of the crank.

Thanks

[Killer_Mopar]

The 383 in my car had the same problem and my solution was to cut off the end of the input shaft. I remember reading once that cutting the input shaft was better than drilling the crank because it was less of a risk. Also, go with the roller pilot bearing if you already haven't.

[Chryco Psycho]

what was the distance between the trans & belhousing when it stopped , generally yo uwill only need a 1/4 or so of extra depth

[67Vette427]

Thanks for the input. I had a 1/8" inch gap approximately. I drilled about an 1/8 off the crank and close to a 1/4 of the input and now I'll see if it works....

[Chryco Psycho]

OK
I would not have cut the input personally

[67Vette427]

oops, too late  At least its the OD trans... not the original. Next time the motor comes out, if it does I'll change out the shaft.