I have a set of Marshal Comp II LED electrical gauges from my truck for sale; Their website can give you more info then I can: http://www.marshallinstruments.com/ They are the Comp II LED series, Speedo and Tach are 3 3/8, the Water temp, Oil pressure, Volts and Fuel are 2 1/16. The Fuel is 0-90 ohm GM. This is just before I pulled them from my truck, the panel isn't included just the gauges. Speedometer Tach Both gauges have had the mounting stud trimmed way down for clearance so make sure that will work for you. And the rest: The oil and temp senders come with them and I'll put in the adapters I got with my new Autometers. I'm changing these out because with them being LED I can't dim them with the factory switch. Asking $275 shipped to the lower 48. If you want to PM me with an offer please include your zip code.