Have replaced fuel tank filter (emptied tank first) and fuel line filter(electic fuel ppump work fine/good pressure and flow); but even tough the runs well I have repeatedly had the engine die on acceleration and acts as tough it is fuel staved. Question is; is there another filter in the main fuelintake or can it be the float value itself?

I USED HAVE AN 82 NISSAN PICK UP THERE IS A SMALL FILTER INSIDE THE FUEL PUMP IT SELF YOU CAN TAKE THE BOTTEM OF THAT PUMP OFFTHERE IS LOCATER PINS ON THE SIDES OF THE PUMP NEAR THE BOTTEM OF THE PUMP PUT A WRENCH OR SOCKET ON THE BOTTOM AND TURN IT LIKE A 1/4 AND THE BOTTOM COMES OFF YOULL SEE THE FILTER THEN JUST CLEAN IT AND PUT IT BACK IN THATS A GOOD LITTLE PUMP I NEVER HAD TO REPLACE IT AND I HAD THE TRUCK FOR CLOSE TO 20 YEARS THE OLNY PROBLEM I HAD WAS THE TANK FILTER IN THE WINTER WOULD FREEZE I THINK BECAUSE IT WAS PLASTIC AND MESH IN SIDE WAS SO FINE IT WOULD CREATE CONDENSATION I USE TO TAKE A CUP OF HOT WATERSTICK IT UP UNDER THE TRUCK TO THAW IT OUT

This certainly sounds like a fuel restriction issue and can be caused by a number of reasons. Since you replaced all known filters already then the next step is to try and locate a squashed rubber fuel line or a partially crushed metal fuel line. Also, if there is a single small hole in any fuel line, it may cause your fuel delivery system to **** air and this will wind up in the fuel resevoir preventing fuel delivery to your intake so plugging your fuel lines on both ends and then running a pressure check on those lines will tell you if you have a hole anywhere along the fuel line path. Also, there could be a leak in your intake manifold such as a bad gasket or cracked housing.