Hard to say for sure without knowing exactly what engine is in it.......I believe the original V8 in this "should" be a 315 Dodge Poly.
John is right about the crankshafts and needing an adapter. The Dodge Poly's will take the same adapter as the first generation Hemi's which are available from several sources including Hot Hemi Heads.
1957 Plymouth (Hemi, Dual Quads, A833 4 Speed 9 1/4 w 4.10) Sold
1937 Dodge Pickup (Hemi, 6X2 intake, 46RH, Dana 60 w 4.56) Sold
1968 Plymouth Valiant 2dr sedan (354 HEMI, 46RH w/4.30 gears)
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