Improve the TBI 454 or go 8.1?

Old 01-10-2011, 02:52 PM
  #1  
supergass
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Default Improve the TBI 454 or go 8.1?

I have a 89 GMC Dually with a stock TBI 7.4. It does have headers but would I be better off changing the heads and intake to a 049s I have that are ported with big valves and maybe a camshaft and stay TBI or I also have a 8.1 complete with a 4L80E that I can get a harness from Nordstrom for 875.00 to run it all. Thanks!
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Old 01-11-2011, 09:56 PM
  #2  
kwkracing
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dont waste ur time or money on improving a tbi, put the 8.1 in
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