My own opinion,since a 57 Chevy was made famous by the 283 V8,I would probably do a V-8.A 350 can be made to look close to a stock 283 for very little money.Good running Chevy V8's can be had for 500 bucks or less all day long,no need to spend 1800 bucks on a low HP crate engine.If it was an earlier car,I would go with a 6.Not to say a six isn't worth considering in your car.
Your car,your decision.
Enough of any one type parked in a long row gets ho hum,no matter if it's V8 or inline


70 Triumph 650 cc ECTA current record holder