My '48 was screaming for mercy at 45mph, so I doubt a '38 would go any faster. Mine had a 235. The '38 had a 216. It would probably last about five or ten minutes at 50mph before it gave up the ghost. And then you have to try and stop it.
That's why my '48 has four wheel power disc brakes and a 5 speed overdrive tranny with a 3.73 limited slip rear.
