hello from New Zealand, 18 spline head ache a833.

Yup. Way WAY back in about '73 I swapped a 340 into my 70 440-6 RR. Had to have the hole in the bell turned out larger for the retainer, and just got a 10 1/2" 18 spline disk.

YOU MAY HAVE A SMALL BLOCK whereby the crank pilot hole is not finished, and I had a 5.9 Magnum that was not bored at ALL. Automatic, it only had the converter bore bored

You need 1 of 2 ways:

Whatever 3 ways you need the crank hole deep enough to clear the shaft end, obviously

1...You do NOT need to run a pilot in the original "stick" part of the crank. You can run the newer large pilot that fits in the converter bore In this case the very end of the pilot bore does not need to be "finished," but just large enough to for sure clear the crank

2....You could have the crank bored to fit the original type pilot, IE duplicate an LA factory stick crank

Years ago there were small diameter pilots made to fit the undersize diameter automatic cranks

Everybody recommends "Brewers Performance." I've not dealt with them, but they seem to have a good reputation.


http://www.brewersperformance.com/