i have 89 with 93 350 trottle body injection took it to mechanic .he spiced and cut and cant get it to run right now until it warms up.it dont shift until it get to 4000 rpm when it is cold in the morning .then when it warms up it shifts too low and then it shift slow and mushy. THE motor has less than 3000 miles on it and has had spark plug wires replaced 3 times. plugs are fouled regularly.plugs last a week maybe 2 weeks

I need some help with getting it to run right. It runs like ****. any ideas???