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Old 11-11-2008, 01:19 AM   #11
longorange68
Registered User
 
Join Date: Apr 2006
Location: Hockinson, Washington
Posts: 114
Re: 250 Inline 6 Performance Build Q's---Hello Brad---

So, I have been looking into pepping the old girl up, and after taking Brad's advice to heart, maybe I really don't need an entire rebuild after all. I have been looking on line for ideas for what to do and I ran across a few things I would like some insight on. I play with V8's mostly and to be quite honest, am a little behind the curve as far as inline performance is concerned. In a V8, I would probably go with a new intake and headers, new carb, and maybe a cam. I would only touch the valvetrain itself if the lift and duration of the cam requires it.
My approach here wouldn't be too different, except I think that the valvetrain is a little worse for wear, especially after being parked for a 3 year period without running. What lift and duration would be wise for a streetable truck? I know Clifford is pretty proud of their 264 "special grind" cam, but what other lift and duration cam may offer up some power without making the engine idle too rough? Would roller lifter or roller rockers be worth the cost? I am interested in headers too, any recommendations on headers that don't warp and constantly chew up exhaust gaskets? I was thinking on going with a dual exhaust anyways, how much do the split headers actually help?
Any thoughts on carbs? What does everyone typically run? I am looking into a 4bbl with a decent water heated intake. How many cfm for a 4bbl carb on this type of motor??? Sorry to ramble on, got a lot of questions...

Check out these links so you can see what I have been looking at.

http://store.summitracing.com/egnsea...924497&NeXID=5

http://store.summitracing.com/partde...6&autoview=sku

http://store.summitracing.com/egnsea...115+4294923429
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1968 Chevrolet C-10, 2WD, Longbox, Vortec 350, Monster Transmission 700R4, 3.73 gears

Good judgment comes from experience, and experience, well......that comes from bad judgment.


1968 Chevy C-10 "Longshot": Bought used from my Uncle George in 1994 and proceeding to beat the hell out of it for 4 years. Sold it. Bought it back, dumped an ungodly amount of money into it since then.
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