Team Chevelle banner

can 1970 SS gauges be used for 350 small block

3839 2
I'm in the process of creating a SS clone however it'll be a while before I get a big block for my car. I do, however, have a SS dash/gauge/wiring package. Can I install the big block dash, gauges and wiring and connect them to my 350 small block without modifying my new BB engine compartment wiring extensivly. Thanks in advance
Not open for further replies.
1 - 3 of 3 Posts

325 Posts
The gauges do care. An L6 engine won't work with a V8 tach. The OE V8 tachs attach to the negative terminal of the coil. So each time the distributor tells the coil to fire the tach also registers a signal. The L6 engine will turn 1.25 revolutions for evey one rev indicated by the tach.

1000rpm indicated = 1250rpm actual
2000rpm indicated = 2500rpm actual
3000rpm indicated = 3750rpm actual
4000rpm indicated = 5000rpm actual
5000rpm indicated = 6250rpm actual

You can see how this is bad. Some instruments (like a timing light) only read the number of times cylinder #1 fires. In that case the number of cylinders doesn't matter. But for an OE tach: V8 Tach - V8 engine.

You are correct in that the situation we are repsonding to, it will work properly. Just for the archive's sake I wanted to weigh in on this very slight point.
??michael j Team Chevelle Gold #77
70 Chevelle SS396 4sp, Fathom Blue/White Stripes - Canadian built

[This message has been edited by michael j (edited 11-23-99).]
1 - 3 of 3 Posts
Not open for further replies.