Re: 400 rwhp and 20+ mpg?
I would look at a 4.8 LS with a turbo. Couple it with a 6-speed auto. You could get there with the right gear out back-and have a screamer when you wanted it.
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'83 K20-TPI
'73 C10
'79 C10-ex-diesel(SOLD)
'07 Tahoe(Son driving)
'14 Suburban-DD
'71 C10-current project
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