I have a 3.8 6cyl in my toyota,it is alil over stock RV cam,stock heads,edelbrock intake,500cfm edelbrock carb that i am gonna replace with a holley 750,is that posible if i would rejet the carb or is it to much for this motor,the edelbrock has always over fed the motor,for 1 thing i dont know how to work on a edelbrock so that could be my problem.I can work on holleys,the 750 is a single feed vacumn sec.If this carb. will not work, then what will?

I have a 3.8 6cyl in my toyota,it is alil over stock RV cam,stock heads,edelbrock intake,500cfm edelbrock carb that i am gonna replace with a holley 750,is that posible if i would rejet the carb or is it to much for this motor,the edelbrock has always over fed the motor,for 1 thing i dont know how to work on a edelbrock so that could be my problem.I can work on holleys,the 750 is a single feed vacumn sec.If this carb. will not work, then what will?

You'll drown it even if you rejet the 750. I would throw on a 390 Holley. I ran one on my 3.8 and it was great. Second option, adapt a TBI set up. You can use everything off a 4.3 Chevy. Very easy to do.