For what it is worth, knowing that the Hitachi flat tops are an SU HIF design, I did a quick search for SU HIF fuel filter. Did not really turn up much, (other than lots of discussions about how to tune/rebuild those used on later Minis and other British cars)  but did find this plastic looking filter of the same design. If really plastic,  probably not suitable.  

http://sucarb.co.uk/fuel-filter-for-fuel-pump-body.html

just a thought...

 

Hmmm, it's a bit large, but definitely the right shape.

Here are the injector screens, I guess they are too small.

 

 

1 hour ago, grannyknot said:

Here are the injector screens, I guess they are too small.

Actually, they look like they may be just right.  The old flat top filter is shown on the earlier pics next to the dime.  The white one above is for a fuel pump and looks to be 3X too large.  Do you have a part number?

Thanks

I don't have a p/n but they are the standard filter for the fuel injectors on a 280z. If you can find them you are welcome to these, I have 6 used ones but once they are back flushed they are as good as new.

21 minutes ago, grannyknot said:

I don't have a p/n but they are the standard filter for the fuel injectors on a 280z. If you can find them you are welcome to these, I have 6 used ones but once they are back flushed they are as good as new.

Will take measurement tonight in millimeters.  If they are close I will take you up on your offer, Thanks!

I measured the filter with my calipers. It is .5" (12.7mm) long and .25" (6.4mm)diam.  Those fuel injector filters are pretty doggone close. Will need to open up the small end as the carb filter is open on both sides.  Will do a bit more checking here.  If nothing shows up, I will PM you with my info.

Excellent work motorman7.  I also couldn't find any small in body filters, and agree, why aren't they in the rebuild kits?

It's a must on a period correct restoration I think..

You can't have a late 72, 73 ( 73 only ? ) with round tops...

Here's a teaser photo....more to follow

OMG, I'm drooling.  This will be one sweet ride.  Can't wait to start assembly.

I regret that I have but one like to give....