170 K is alot of miles for any engine and tranny. A rebuild would most certainly be in order. Although the initial cost is pretty cheap... the rebuild parts will be more than a chevy. If you are Hotrodding that engine the performance parts will be MUCH MORE THAN A CHEVY.

The olds engines are great engines in olds. The cost to build and adapt them to another chasis is usually higher than a Chevy. There is a reason everybody runs Chevy engines in there rod.