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Im assuming its a 305tbi?, cant do a whole lot with that motor, its not worth boring out and stroking for the little power you will get out of the 305, the best thing to do is get a 350 in there. If you wanna keep your 305 get bigger gear ratios in the rear is the best you can do with it. I had the stock 2.73 non posi in mine..I got a rebuilt 10 bolt 3.42 posi from a 92 z28 and it made a good differance plus it had the rear disc brakes and you dont have to deal with your crummy rear Drums. Remember tho if you do that swap you will also need a proportioning valve from a 89-92 rear disc comaro because the drum prop valve is not enough power for the discs.

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12y ago

What else can I help you with?