For all of you out there that have swapped in a SBC, I used TPI, what have you done about the speedo and the tach. How did you hook them up? How did you wire them? ETC, ETC!

Thanks

you have to change the tach to a v8 tach, hook to the same place GM's tach hooks up (should be in dizzy harness)
As far as speedo is concerned, depending on t-case your gonna have to play with gears or use a VSB type unit from Superlift if you have an electronic trans

What tcase are you using and how did you (if you did) do the VSS?

EDIT: Just read on your 465 post that you have a 300, that is (obviously) what I have. I am just going to be running a mechanical speedo from an earlier YJ. I have the inline VSS, so I can just plug the speedo cable into that.

The other option (love to do this, but I don't have the cash right now) for me is to go with a panel mount GPS for a speedo.

I replaced every gauge with VDOs. Autometers would work too. :D

You can wire up all the stock guages to work with the Chevy, a buddy of mine is doing it as I type, he's using an S-10 NP231 behind his 700R4, so the speedo was a plug in, but the tach needs to be recalibrated, Dakota digital makes a setup for this, but I haven't looked at it yet.

Charly

I haven't considered a mechanical speedo, but i will look into it now. Thanks.

I have a Painless harness and bypassed the VSS, but still have the wiring under dash. How do you make this work?

Just get the Painless VSS for TBI (IIRC it's the 2 pulse version) either way, it's advertised as the "TBI version". Cost $80-$90. I got mine with the harness from Summit.

Screw this onto the tcase speedo assembly (other end allows a standard speedo cable to attach..it's technically an inline VSS). As far as wiring it's one wire to the VSS wire in your Painless harness and one to ground. I have the Painles harness too.

That simple and your drivability will improve.

you have to change the tach to a v8 tach

Sometimes the solution to a problem like this is NOT to just chuck out the old OEM part :p

Check it out:
http://www.off-road.com/toyota/tachmod.html

This was just the ticket for my 5.0->YJ swap.

Chris

not sure what years would be included but Dodge uses a a VSS that threads on in place of the speedometer cable.. by the way mine is a 93

Actually, the earlier injected YJs (I think it's the 4 cyl TBIs) use the mechanical speedo and a VSS (basically an inline VSS), but I'm not sure if it's the same pulse generation as a GM computer needs (I know some VSS's are 2 pulse, some 4). I believe it will thread onto a 300.

Originally posted by Charly
Actually, the earlier injected YJs (I think it's the 4 cyl TBIs) use the mechanical speedo and a VSS (basically an inline VSS), but I'm not sure if it's the same pulse generation as a GM computer needs (I know some VSS's are 2 pulse, some 4). I believe it will thread onto a 300.

If the documents that came with my gauges are to be believed, GM trucks use a 16-pulse-per-revolution system...

hmmm, maybe it's a TBI vs. TPI thing