I would recommend either Bryan @ latemodelengines.com or Erik @ hkracingengines.com to build your 427. Two of the best when it comes to LS engines. I have dealt with Bryan and have nothing but good things to say about him and have also heard a lot of positive things about Erik. Can't go wrong with either. A $15k budget is more than enough and a Katech torquer cam should give you 500rwhp with great streat manners. Stick with a GM LS7 block and GM LS7 heads and you should be well under your budget.
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Vic N
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