Have this 5.0 EFI sitting around and also have an exhaust backfire, only when warm, on my 70. Have not messed with ign too much, so it is possible it could be ign related, but I suspect it may be a sticking valve.
I think the dual tanks are cool and do not want to go to a single large rear tank. Was thinking of a rail mounted pump and a single return line to the main tank with a line between the tanks to equalize them. Obviously that would kind of be making just one big tank out them, but it would eliminate switching of pickups/guages as you could just use the main one and save the cost of a large tank.
I figure the main pump is returning just a slight amount less than it is drawing, so the gradual reduction in the main tank should be able to be kept up with by the cross over line from the aux tank.
And yes, this may not work at extreme angles (if gas bleeds back to aux tank), but this will be a street rig with possibly a very mild mud run or cruise through flat trails in the woods.
I think the dual tanks are cool and do not want to go to a single large rear tank. Was thinking of a rail mounted pump and a single return line to the main tank with a line between the tanks to equalize them. Obviously that would kind of be making just one big tank out them, but it would eliminate switching of pickups/guages as you could just use the main one and save the cost of a large tank.
I figure the main pump is returning just a slight amount less than it is drawing, so the gradual reduction in the main tank should be able to be kept up with by the cross over line from the aux tank.
And yes, this may not work at extreme angles (if gas bleeds back to aux tank), but this will be a street rig with possibly a very mild mud run or cruise through flat trails in the woods.