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Re: Best Heads to pick?
The swirl port heads are the 193 castings and are designed to improve Torque from idle to 4000 rpm. To help the heads out, you could do a light home cleanup (video on youtube). The best bang for the buck in your case (IMO) would be to convert to 383 and accentuate the driving range 1500-4000 rpm that you will be spending 90+ percent of your time.
If you wanted to get new heads, get a 350 Vortec crate motor. You can get a new motor for `2000 and an intake from summit from 135.00. Buy the time you bought the heads (`700 ) + cam you are near the 1000 mark (`900 to be exact). For the cost of machine work + your 1000.00 - you could have a brand new motor.
The new motor would have vortec heads and a roller cam (which I believe yours is flat tappet).
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