'64 driveline rear gear ??

[Flthead]

Been lurking for awhile on here , been into Chevy trucks for bout 35 + yrs . Currently own. '37 Chevy pickup , street rod . '70 short step '82 long fleet . An bought a '64 long fleet about 15-18 years ago an been in dry storage till now . Time to get it done . Have question on running gear , currently 292 3 speed . Have '83 spindles an brake parts for disc up front . '76 power steering box linkage . Have a '85 rear with 2:73 gear set . I can mount '85 rear into. '64 easy enough , question is how would 2:73 gears be with the 3 speed manual trans. Won't be pulling or husk long any loads . Was thinking first gear may be a lil slow going . Your thought ?