Rattling Dominator

I have a model 99 600 Dominator. Just been rebuilt and it rattles much more than it used to. It has new pistons and cast rings. The noise really sounds like the top end but it may be piston slap. The rockers are gapped correctly and oil is being delivered ok. The bore was given one extra thou based on recommendation of boring engineer. It also vibrates lots, more than I remember. The crank, and pistons were balanced but I suspect when you do balancing you should include everything attached to the crank, ie alternator, primary sprocket etc. is this right?
Regards
Kwraith

One thou more than what?

Kwraith said:

The crank, and pistons were balanced but I suspect when you do balancing you should include everything attached to the crank, ie alternator, primary sprocket etc. is this right?

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Only if doing dynamic balancing and then the alternator rotor and engine sprocket are pushing the quest too far.

Who did the balancing, are they are experienced in balancing 360 twin cranks and what balance factor did you specify.

First off go for basics, are all the mounting hardware still present and torqued up plus have you fitted the head steady.

Ok thanks. Yes all the mountings are present snd tight. I am not sure but the guy had some documentation on the balance requirement. The business did only balancing but mostly cars

Kwraith said:

but mostly cars

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That is likely your issue.