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post #11 of (permalink) Old 08-16-2018, 06:20 AM Thread Starter
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lsugymrat24's Avatar
Join Date: Nov 2013
Location: Baton Rouge, LA
Posts: 194
Re: Low rpm 390 stroker advice

Went with the recommendations. Sent the 600cfm carb back to Summit and ordered a Quick Fuel 780cfm SS-series. better adjustability with dual billet metering blocks and adjustable secondary without having to swap springs. should cover top end performance. Should I be worried about dialing in at low 1800 rpm stall speed for the stock transmission and 108 lsa cam?

I've been thinking really hard about the stock transmission. the original plan was to mildly modify the 390 and rebuilding the 3 speed cruiseomatic. now that I'm going with a 440 engine and exceeding 400hp, will the old FMX be ok or should I be looking at a new C6? I would like to save some money by keeping the old FMX but does it make sense?
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