1970 Javelin fuel tank size

Big car tanks are side fill, not rear.

greenhue wrote: I was wondering if any new tanks fit my 70 Javelin. It now has 16 gallon tank and at 10 MPG , I can drive only a few hours before refueling. Somebody got one from Chiefs auto parts but it only was listed for 1971 and up. Is there that much of a difference in the years or did Javelins stay the same throughout the years? Will an Ambassador tank fit? Anybody refit any other models onto their cars? No fuel cells, please.

Since it is a 70 model, it must be a California car if it has a 16 gallon tank. The other 49 states had 19 gallon tanks in 1970, and all were 16 in 1971.

mmaher94087 wrote: ..and at 10 MPG .."  Hum, not stock?  My '70 was better than 23 MPG.

My 70 - 360 AMX was around 12-15 mpg city/hwy when it was stock. I have no idea what it gets now, as I run it hard and never check it. Of course it has a 3.54 gear which makes a big difference compared to a 2.87. 

I have the Spectra AMC1 tank on my '74 Javelin and used the pickup, straps, etc. for a Concord, but changed the potentiometer strip in the pickup to the early one to work with the stock gauge.   Worked fine with later Javelin push-in filler neck.   Vent line needed to be routed to opposite side, so modified the new tank before putting any gas in it.   For a '70,  you'd need to solder/braze in the filler neck or maybe change to the later push-in filler neck (not sure it works??).   Good time to also modify the tank for an in-tank fuel pump if ever considering EFI.  The stock tank didn't give enough range for me either.

I have a 71 jav originally sold in CA, would this be a 19 gallon tank?