Using lead for body work

[68protouring454]

it will use just as much filler cause you will have a huge weld seamon a 80% 1/4, if you did a complete 1/4, you would use barely any, but the 80% will have a 4-5 ft seam that you will need to weld solid, taking your time, not to heat it up too much, i would weld an inch or so at a time going back and forth to each end, i would take a whole day top weld it at least, just inbetween welding work on another area of the car.
but like you said if you do not do the whole thing, buy the 80% 1/4 then cut a patch out of it you need, i would splice right under the belt line about an inch,ack to say an inch off the tail panel, and then probaly an inch or so off the wheel well, make the new patch over lap by way of flanging, and tack weld up, then tack away until its solid welded, grind, check for pin holes, touch up, then fill away, using a fiber resin bondo first if you wish, but if it is no more than a 1/16th or an 1/8 i would put a good quality filler to it, goodluck
jake