This is a similar topic, and peaked my curiosity when I found it; Are the frames numbered? I found a "757" welded on the frame on the side of the engine compartment. I figured this was either a frame number or a leftover part from a Boeing. With my car, it's anyone's guess. Speaking of which, where can I get a heli-coil? I've contacted lockheed martin and northrup grumman but keep getting the run-around. Thanks Jim 1537 On Tue, 4 Jun 2002 20:43:56 +0100 "Darren Cunningham" <darren.cunningham@xxxx> writes: > Does anybody know how engine numbers were allocated - was it just > random and > it depended on which engine was nearest :-). Or did they go up > sequentially > as cars were produced.