The best replacement for 350 is 383.

The best alternatives to 350 are rated as following:
★★★★★  383
★★★★  454
★★★  305
★★★  327
★★★  400
★★★  5.3
★★  acura mdx
★★  351
★  ls1
★  400 transmission
★  360
★  383 stroker
★  396
★  400 small block
★  boeing 787
★  bmw x3
★  700r4
★  turbo 400
★  400 sbc
★  305 how to tell
★  302
★  325 for turkey
★  nuvi 360
★  355
★  500 exc
★  infiniti g35
★  lt1
  acura tl
  787
  f-250
  audi q5
  bmw x5
  g35
  5.7
  thunderbird
  400ex
  bmw 5 series
  electra
  mdx
  powerglide
  mercedes ml
  toyota avalon
  2013 bmw 5 series
  x5
  375
  suzuki burgman 400
  mercedes e350
  400 block
  pvr 500
  370
  slingbox solo
  slingbox 500
  volvo xc60
  chevy 350
  lexus 450
  c550

Your alternative for 350 is not listed? Suggest!
Speaking about 350, one probably shouldn't forget about 700r4.

Other search terms related to 350 and their ratings are:
★★★★★ 700r4
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Google Trends

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350
383
454