The best replacement for 302 is 351.

The best alternatives to 302 are rated as following:
★★★★★  351
★★★★  304 stainless steel
★★★  301
★★★  350
★★★  351w
★★  289
★★  4.6
★★  307
★  305
★  306
★  5.0
★  460
★  347
★  351 windsor
★  331
★  351 cleveland
★  390
★  307 redirect
★  300
★  302 ho
  303
  shelby gt500
  301 redirect
  404
  201
  gt
  327
  camaro 1le
  boss 429
  304 stainless
  shelby
  gt500
  z28
  318
  chevy 350
  section 404
  chevy 305
  nokia c3
  302ho
  351 bronco
  351c

Your alternative for 302 is not listed? Suggest!
Speaking about 302, one probably shouldn't forget about afr heads.

Other search terms related to 302 and their ratings are:
★★★★★ afr heads
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302
351
304 stainless steel