Wow that looks great! Love the opening hood, what a great idea they had. I think the hinges were metal piano hinges held in place with little plastic pins you glued through the holes. I have the same kit by Entex (in the 70's), and would recommend it to anyone. This kit was the forerunner to all the current quality Japanese kits. Back when this was first issued a lot of the Japanese kits were those hokey things with motors that were more toys than scale models. I think you'll agree that this kit is a far cry from the other Minicraft kit you did, the Triumph TR3A. That one came out super, too, but I'm sure it took a lot more effort to correct all the flaws.
Congratulations on an excellent build. I'm gonna go dust mine off...