I have a 88 IROC with a tired 350 TPI. I came across what seems to be a pretty good deal on a 67 327.

327 bored 30 over
Camel Hump heads 2.02 valves
Comp Cams Magnum 292 Cam

Would this bolt right up and work with my TH700-R4 transmission? Would that set-up be too wild? Emissions is not an issue.

 

Well, its a 2 piece rear main seal, so you'll need to by a 1 piece adapter for it so it will hook up to your bellhousing. And, you'll need a new intake base for the older style intake bolt alignment, that is, if you plan to put your TPI on the 327.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End with 2.77:1 Gears.

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Accel High Flow TPI Baseplate, Edelbrock TES 1 5/8" Headers, Catco 3" High-Flow Catalytic Converter, Hooker 3" Aerochamber Cat-Back System, Transgo Shift Kit, Performance Resource Chip, Accel Ignition, K&N Filters, Jet TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET: 14.32 @ 97.7mph
(corrected for elevation)

 

Aside from that, the TPI might not be the best selection for an induction system on a 327. The 327 likes to make more power at RPM and might need more high end flow than the TPI will provide.

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Later,
Vader
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"Let the bodies hit the floor!"
Adobe Acrobat Reader

 

Its definately going to be carb.

 

If the heads are the ones with no bolt holes, you'll have a rough time getting your accessories installed.

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"So many Mustangs, so little time..."
ICON Motorsports

 

The 1968 327 was the only one to have the large journal crankshaft. Therefore you'll have a small journal crank in that engine.
That will give you a potential problem. The 327 makes power at high rpms, but the crank may not be strong enough. I would reccomend rebuilding your existing 350 motor.

 

Could you please expand on this. I don't understand how the main seal effects the bellhousing. If it does I'll be a little worried, because I'm using a two piece real seal on my '89 right now. I am using an early model flex plate. Is this what you were referring to?


[This message has been edited by ATOMonkey (edited August 13, 2001).]

 

you don't need a one piece adapter unless your planning to put that crank in a one piece block. another common wrong answer given by someone with incorrect info. your just going to need a flexplate for an earlier model. 85 or older.

 

This was discussed on an earlier thread about 327's. The small-journal 327 cranks apparently were forged. Plenty strong. Probably stronger than 327 or 350 cast large journal.

I would also disagree with the "high RPM's" statement, as if these engines had no torque. They'll out-torque a 305, all other things being equal. Torque vs. HP is a function of "the package", i.e., cam, heads, intake, exhaust, etc. being matched to work together. 327 truck motors made plenty of torque and would barely wrap to 5 grand, trust me. Some 327 Vette engines were barely streetable because of their cam/intake giving them no power below 2500.

So, enough of the blanket statements, already.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).

 

I used to run an big old farm truck full of grain with a 327. Had plenty of torque. The governer was set at 3500rpm. It all depends on how you build it. They do need to rev higher to make the same HP as a 350. Think of a 350 as a 'stroked' 327. People stroke a 350 to 383 to produce more power, the same is true with a 327 to a 350.

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350 with stealth intake, holley carb, 470 lift cam. 700r4 with .5 boost valve, vette servo, tci lock-up kit, B&M megashifter. Richmond 3.73 gears, powertrax locker, timkin bearings, synthetic lube. Custom 3 inch single into 2 2.5 pipes. 1 1/2 drop springs, 1 5/16 solid front sway bar, 1 inch rear bar, custom subframe connectors, custom LCA relocation brackets. Kobel ground FX, current red metallic paint. Lots of other stuff...
82camaro

 

I love 327s I'll take a 327 over a 350 any day of the week but a tpi on one no, these motors love to rev 8500 is no problem and breakage is seldom why do you think GM doesent make them any more they were too dependable and didn't need repairs as often, all small journal engines had forged steel cranks,small journals bering speed is slower than lg ones therefore less fatigue these engines also give more responce to hipef mods than a 350 and will give just as much hp but at higher rpms and higher rpms means your car goes faster and a shorter crank stroke means the engine revs quicker,yes give me a 327.I have always had one hanging around, I have one now the rarest chevy engine in exsistance a 1968 4bolt main,forged steel tuftrided crank,forged piston,fulie headded 327 from a nova that had no radio or heater, vinal rugs and seats 12bolt posi and M22. I have owned the engine scince 1975 and rebuilt it in 86 but the crank has never been cut and runs on the tight side of the tolerences .005 on all journals and runs a lunati cam, the tach says just over 9000rpms.yes a 327 is thee chevy smallblock. amen

 

Got me seriously considering this. The car wouldn't be a daily driver just a weekend cruising/racing car. I have little engine swaping experience but I have plenty of friends who do and would help. Dan87IROC-Z mentioned needing a 1 peice seal adaptor to make it work with my TH700R4. Who makes these and where can I find one? I looked in jegs and summit and didnt see anything. I just need to be convinced that it'll bolt right up with no major/expensive problems.

 

He's got it wrong, as zippy said. You just need a 2-piece style flexplate. An adapter is needed to put a 2-piece style crank in a 1-piece style block. You don't have that problem.

82camaro summed it up: To make the same power as a 350, the 327 has to rev higher. Period.
A 350 really is just a stroked 327.

 

I'm curently piecing together a 327. I'm hoping the lack of torq that they put out will save my WC T5 transmission, get better gas mileage, and still put out some major HP!

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1991 Z28 305 5spd 1LE, TES headers, dual cats, 3 Chamber flowmaster, Comp cams .488/.495 212/218, 187 head castings with bigger valves, self-burned eproms.
All work done by myself, and proud of it!
SOON TO COME 327 Miniram (3/2002) PARTS NEEDED:Titanium valvetrain parts, stud girdles, fluidampnr, miniram, bulletproof bellhousing, MONEY(im in college).
Find a .bin on the internet and want it burned? I'll do it for you!