Mike,
Vince (Shelby LV) measured an HST 4000 with the Blue Thunder, we compared the intake heights (we have both on hand) and jointly verified it will fit in the 4000 HST Glass cars and the A/C Aluminum cars. The BG Blue Carbs will fit even better.
These are some different views of each manifold.
Tunnel Wedge View
Tunnel Wedge View
Tunnel Wedge View
Tunnel Wedge View
Tunnel Wedge View
Tunnel Wedge View
Tunnel Wedge View
Blue Thunder
Blue Thunder
Blue Thunder
Blue Thunder
Blue Thunder
Blue Thunder
Blue Thunder
Blue Thunder