Fuel Cap - '84 V20

I lost the original fuel cap and hear that not every 1 1/2" cap will match the threads. Plus, there's no name on it to match anything up. Does anyone have any idea what might work, or, am I in for the hit & miss game.

Thanks,
Ron

[RWilson2526]

I believe you are right about it being hit or miss....if you find one that works though let me know as I need one too. I'll do the same.