It would be WAAAY too early for such a plane that first appeared in 42-43 I think. More likely something vaguely Grummanish or P40 lookalike.P-47 Thunderbolt?
La-5 is basically LaGG-3 from which the engine was sawed off and Su-5 much stronger engine and nose was glued to. But again even LaGG didn't look like a truck. LaGG was fine design, what let it down is that the planed engine never materialised so it used a MUCH weaker one.It isn't the I-16, but it could be one of the other Soviet rotary-engined designs. Being "like a truck" doesn't suggest in-line engines to me, but that does leave alternatives. A prototype Laovochkin perhaps, while the La-5 was of 1942 vintage the Lavochkin Bureau was designing fighter planes earlier, admittedly ones with a different engine style.