flywheel issue
 

changed flywheel now have slight howl in bellhousing area drive slid in good although , alignment issue or what ! thanks rob

Did you " Dial the bell housing and flex plate in" ?

The flywheel/crankshaft CL are the starting index point. Centerline of the flywheel and flex plate are to match the crankshaft centerline, any variation is run out.

Dowel pins are located at the top of the engine block. The bell housing reciever holes may have excess tolerance. Or, there may be other reasons for misalignment.

Misalignment may cause vibration,starter engagement problems and shorten bearing life.

You can use a magnetic base dial indicator snapped to the slowly turned crankshaft to find an acceptable tolerance and location. In some cases, offset dowel pins are required.

As I recall, Marc at Bam may know that tolerance.

im lost any further help to clarify this will be appreciated rob

Why did you change the flywheel? Did you use the correct "type", internal balance (zero dynamic balance) or external balance (intentional offset dynamic balance)?