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Re: Wife's 48
Vortec heads are an easy 40hp gain over the smog heads.
2200 stall and some gear will make it a blast to drive! It's always fun when you can hit the start of the torque curve before you're moving.
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1999 GMC Suburban K2500 SLT, 454/4L80E
1991 Z/28, 6.0L/T56
1949 GMC 250, S10 Frame, 6.0L/4L80E
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