327 chevy truck crank shaft

[68chevylwb]

i have a 68 chevy truck with a 327. the crankshaft is not dilled where the balancer mounts on the crank.my 350 chevy v8 motor has a bolt that holds the balancer on. i talked to the engine builder and he said the crankshafts on 327 engines are not drilled. that started with chevy 350 v8 motors.
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would anyone know if this is right????
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[JimKshortstep4x4]

A lot of the older engines were not drilled and tapped for the damper bolt so your friend is right. I had a 69 307 that was not drilled and tapped so I had a drill bushing tool made up to guide the drill while drilling the hole. (The tool fit over the crankshaft with a center hole to guide the drill). It was a quick and easy job to drill and tap the hole with the 7/16-20 tap.

The dampers seem to stay on with just a press fit but I prefer to have them bolted up.

Jim

[kaycee]

I just put 1 of my 327 in my 69 and it did not have a bolt either but I had the machine shop drill it out and thread it for me.I have 2 other 327 same vintage and both are drilled and tapped from factory.I don't like the idea of the balancer comming off at 6 k rpm.

[speedracer]

my 327 is a 68 and the stock shaft was drilled and the aftermarket one too. It might be due to the fact thats its a 350hp corvette block. The trucks maybe different??