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I have two fresh engines - 327 and crate 350, and HSR, roller, etc. Which to build?

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Old Aug 19, 2008 | 07:05 AM
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From: Charles County, Maryland
Car: 2000 BMW M5
I have two fresh engines - 327 and crate 350, and HSR, roller, etc. Which to build?

I just picked up a car that came with a brand new crate 350 in it the other day. The previous owner was not a car person and never finished the install to get it running right. $1,000 car too. LOL yeay me. Crate motor runs excellent.

I currently have a 327 built and running w/ the following specs:

*1967 327 (small mains)
*stock forged crankshaft
*stock rods
*Speed Pro forged flat top pistons
*Retrofit Comp Cams 0.503"/0.510" roller cam, on 112 LSA
*Comp Cams Pro Magnum retrofit roller lifters (Fast bleed high rpm type)
*World Products Sportsman II heads, freshly re-done, 64cc chambers 200cc runners
*Holley Stealth Ram, 24 lb hr injectors, self tuned
*1 5/8" headers

All in front of a stock rebuild 700R4 that I added a Superior shift kit, fairbanks 3/4 sleeve, 0.500 TV and stiffer pressure reg. spring, corvette servo and accumulators, and a Raptor 5x 2800 stall converter

The 327 has about 30,000 miles on it total, but only about 500 miles since all of the upgrades above were installed. Last time I checked it had dead even compression across all 8.



BUT:
Now I got this brand new crate 350. It is an 8.5:1 290 horse crate motor, but that compression comes w/ dish top pistons w/ valve reliefs, and 76 cc heads. If I put the Sportsman II heads on it, it should be close to 10:1 compression.


ADVANTAGES: The 350 has zero miles on it, and is a 4 bolt main block. THe 327 is a 2 bolt. THe 350 has larger journals. The 350 has powder metallic LT1 rods in it -- the 327 has forged super skinny rods (but they have held up to 30k miles of high rpm shifts).


Would it be worth swapping all the goodies onto the fresh 350? I have enough parts left over from the previous build on the 327, when it was flat tappet and had re worked 305 heads on it, to put it back together that way. I know it ran plenty strong in its previous configuration. The 350, even w/ the tiny cam in it, in the same body style car, just feels like it has a lot more punch to it.
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