Heater Core need help 1996 extened cab

[stsalvage]

they make 2 heater cores for this truck the alum and the copper one which one is better I have old Chevy's and the copper and brass ones seem to hold the heat better and seem to last a Lot longer need to know if the alum would do or fair any better then the copper and brass one you can email me at stsalvage@yahoo,com one last thing i have really pull mine apart and mine is with the 2.3 engine with a 5 speed and from what I've seen why can't you just remove the main dash bolts and do the blower box and out she comes but i did it like how you all did it and i'm glad i did cus it looks like the guy lived in a sand PIT there is so much dirt i'm going to have to blow it out and wipe it down One last thing when you have the dash cluster out best off to change all the bulbs in your dash i had 5 of them that where burned out and i cleaned mine and made it look like new