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Vortec 5.7L swap questions

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01-30-2014, 06:47 AM

87squarebody

Registered User

Join Date: Jun 2012

Location: Lakeland fl

Posts: 67

Re: Vortec 5.7L swap questions

Quote:

Originally Posted by 1981Stepside

If it's an 1986 700r4, no you won't have to change your instrument cluster. Pre 1987 used a mechanical speedo cable and 1987-up went electronic IIRC. Easiest way to tell is to look at the drivers side of the tailhousing. If it has a spot for a cable, you're good.

Ok I have an 87 with 700R4 and mine has a cable.Im confused if it were electronic wouldn't it have a digital dash.

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