chevy full size help PLEASE

im looking at buying this full size but it used to be a 5 speed and the guy swaped it over to auto and u still have to push the clutch in to start it what do i need to do under the dash or in the column it fix this and if the trans starts jumping rpms when its in over drive this is a sign of what? thanks for all the help fellas

What year is the truck? The o/d sounds like the installer may not have wired in an O/D lock up harness. On an ECM controlled trans the computer tells the torque convertor when to go into lock up and when to unlock. If it is a 700R4 trans then you can buy a lock up harness to convert it.  The clutch pedal is a read to ground circuit. The pedal hits a switch and makes ground. Get a wiring schematic and it will show what wires need to be by passed and what need to be sent to ground.  Hoped this helps 

91 thanks for the help and where can i get this harness at

I know both TCI and B&M make one. Both are available through Summitt and Jeg's

ok now here is another problem when the truck is running and u put it in gear it will stall out and if u get it to run it sputters and wants to die and i also need some wiring info i wana put a 98 dash in it the truck is like a 90 what will i need to do to get the gauge cluster to work in this one ?/

anyone?????

there should be a clutch switch you can bypass to so the clutch get used any more i did this on my 5 speed s-10 thinking i had a bad clutch switch chevy dealer  told me what to do never had to push the clutch to start the truck . 

ya i got that fixed had to put in a new gas tank as well and re wiring this thing should be up and running soon anyone do the 98 dash swap if anyone has some tips let me know