What's This Engine Bay: Engine Swap Edition

It's time again to test your automotive intellectual fortitude by figuring out what car this engine bay's from before you click through. Sure, you'll say you got it right in the comments, but only you'll know the truth.

This one was particularly challenging as that Viper V10 was quite obviously not originally intended for the rusty and upright engine bay it currently rests in. The perceptive among you would have noted the shape of the firewall, location of the wiper motor, the fresh air intake and the dual hinge links and maybe, just maybe, if you've got the skill you'd have put it together and guessed correctly, a 1956 Ford F-100 pickup — the sleepiest sleeper we've seen since the Oklahoma Farm Truck.

[The Real JDM, (ironically)]