I have a E-Tec200HO (3.3l)and it works just fine--And I have the back deck loaded.
I cruise at 3400 at around the 35mph range--WOT in the 50+ range with load and a standup top surround.
I am thinking that 175 E-Tec might be just it for a V-20--I would think the 200HO would work great on a V21.
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 88 V-20
200 G2
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