Marshall.
SBC Chevy uses a Fram PH30 From my 500,000 miles driving SBCs.
Thread is
13/16ths-16 threads per inch
FL1A not sure of application this would be a Ford filter, Bill kenz would only deal with Fords:
As I remember this is the filter that Bill Kenz manufactured and (sold me in about 1963) used on the first bypass filter for Model A that mounted in place of side timing gear cover.
They were mostly an aluminum casting with steel inserts for the fittings.
Specs for filter threads are:
3/4-16
BTW 88 Toyota Cressida uses a Fram HP-1,
smaller canister than the Ford or GM filters but same 3/4 16 threads
as Ford filter.
Maybe this helps...
HP-1 Fram page:
http://www.framcatalog.com/PartDetail.aspx?b=F&pn=HP1
http://www.framcatalog.com/PartDetail.aspx?b=F&pn=PH30