i wouldnt go with psi or crank shop myself, from what i have seen and heard, i would go with union bay or price performance. price performance will work with you all the way to make sure you are getting everything out of there engine long after the sale.
personal preference, but I've dealt with most of these guys, price are good people, but I would call iantomassi, there motors make some CRAZY power, and they've been running stuff based off SRX"s for awhile, one of my buddies is running a 1292cc on N20 in his 151" SRX
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