I thought I would add this as I haven't seen it posted anywhere.
Masters put out this statement on 12 July from which can be derived most of the F1 entries:
http://www.mastershistoricracing.com...a-masters-his/
I've listed my interpretation below.
Arrows A4
Arrows A4
ATS HS01
Brabham BT49C
Ensign - Ensign N180 ?
Fittipaldi - Fittipaldi F5A ?
Hesketh 308
Hesketh 308
Ligier JS11/15
Ligier JS17
Lotus 91/5
Maki F101
March - March 761 ?
Penske PC3
Penske PC3
Shadow - Shadow DN5 ?
Surtees TS20
Theodore TR1
Tyrrell 001
Tyrrell 009
Tyrrell 010
Tyrrell 012
Williams FW07
Williams FW07
Williams FW08c