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I recently converted a 390 to a 428...it's not a budget engine...costs rack up quickly. To stay within a tight budget, keep the 390 crank & rods, just go with good bolts. Put your money into the heads and intake if you have it, if not, a good set of stock heads with oversized valves and a good Comp Cams Magnum hyd grind with a vacuum secondary 750 cfm carb will give you plenty of street power...keep the comp. at 10.0:1 and you're in business. Make sure to keep it simple, and you can't go wrong.
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