Put it on gas !
Use 1 of those donut tanks sunken in the boot floor...
Gemini tanks are slight effort to fit especially the parcel shelf. As Matt says, you will have plenty other obstacles to worry about before the tank.

Hey Marti & Matt,
planning ahead is the only way to build or repair these cars.
my biggest concern is earning enough money to keep playing with my toys and these share holder companies like IAG and SUNCORP who own all the insurance company names are destroying the Panelbeating and repair shop industry. People forget who owns the car and who pays the bills. The insurance companies only take the premium and it is the repair shop who give the warranties.
back to it now fellow enthusiasts.
Jim

I agree, a well thought and planned build is a sure way to keep your costs down.
 
My point was whether a modified tank was on the list of immeadiate things to work on. 
 
But then, it's not my build so what i say doesn't mean much at all.
 
Goo dluck with it all.
 
Cheers
 
Matt

A few pic from Factory Original Sporting Mk1



I would say it is the right tank turn around.