L76-LEGENDARY 365-HP 327 SBC UPGRADES- ADD 100 HP!!

HOW TO ADD 100 HP TO YOUR SBC! L76 327 UPGRADES! HEADS, CAM AND INTAKE IS ALL IT TAKES TO ADD OVER 100 HP TO YOUR SBC, INCLUDING THIS 327. CHECK OUT HOW WELL THE STOCK 365-HP 327 DID ON THE DYNO, PLUS HOW WELL THE UPGRADES IMPROVED THE POWER OUTPUT.

[davewilkirson]

As a kid in the 1960's my dad owned an L79 327 in our Nova. Even back in those days all the engine enthusiasts knew how special the 327 really was. I'm 65 now and have a L79 on a stand with a 283/292 on another stand with both all new parts. I'm currently modifying my Gen 4 BBC in my 454SS 1990 truck with air gap manifold, new stage 3 cam, HEI, 850 Brawler, and a few other parts. In 2001 I built a 502 CID crate (Scoggin-Dickey) Boss Hoss bike at my house in Plano, Texas and rode it for 5 years until the NESCO transmission planetary disintegrated. I guess I am a gear head. It is not my profession as I was trained as an EE engineer and worked 37 years on telecom systems around the globe. I recently rebuilt an old 1966 Ford FE 428 that was rusted and full of mud bugs. It was from my father-in-law of whom died in 2020. I was really intrigued by the Ford 428. The heads and manifold merged in a unique design unlike GM products of that era. It is fun stuff working on this type of machinery. One day soon after most of us are dead it will be today's kids working on electrical powered vehicles. I see Tesla vehicles on the roads in Dallas and Fort Worth daily but they don't appear as mean as a 1970 LS6 or a Hemi Cuda. I'm thankful I was given the chance to grow up in the muscle car years. Hot 327 powered Camaros, hot girls, 8-tracks under dash, and plenty of fun times. Long live the internal combustion engine.

[hotrodswoodshed]

First off anyone comparing this to a big cubic inch or an LS, obviously missing the point. I had drag race a l 76 set up for years. Small Journal 327, .060 overbore, Same .120 dome pistons.. very same duntov 3030 cam. And using camel hump cylinder heads with some mild Port smoothing. It always ran super strong considering it was small cubic inch. At some point I installed Herbert roller cam CC6k 244 - 252 at .050 .600lift. With old-school 292 turbo heads. Never had it dynoed, but clearly the roller cam and 292 heads made significant power difference. Almost full half-second faster in the 8th mile than the duntov CAM setup. I always wondered what the actual Dyno power was from the original setup. That's what makes this video so interesting to me. Thank you for putting some focus on it

[jamesguidry]

In 1973 Ole Sam and I built a 327 from the bottom up good pistons Edelbrock Tarantula intake Crane Fireball hydraulic cam Hooker headers glass bead factory cast iron small valve heads with Manley Stainless tulip swirl finished valves & a Holley Dual inlet double pumper 600 cfm carb.into my 1964 Chevy II SS Nova 2DR hardtop with a Turbo 350 trans. & 4.56 gears ! Man what a ride ! Glory Days for sure !

[donellmuniz]

440hp from only 327 (or 331 at .030 over) ci, NA, is outstanding! And no low end tradeoff of torque! Tremendous gains! That in a 63 Nova would be wild! Looks streetable too.

[tomnekuda]

You just renewed my faith in the 327 and I remember how impressed we were when that engine came out and we started dumping them in our tri-5 Chevys and our Chevy II's and Novas. At that point the double -hump heads were as good as we could get.

[josephclay]

I love my 365hp 327 I have put in several different cars over the years it's on the stand for a rebuild and up grade rite now thanks for the information I will follow some of your build my 71 ventura will love it thanks Joe clay

[kimmorrison]

as i recall the L76 engine was a Vette only option. Great engine back in the day. So interesting how these engines really wake up with modern day components

[johnoliver]

Good job .we all know with today's technology you can make the 327 more powerful, and thats great. I have a 1965 300hp 327 and just bought a offenhauser 3 two barrel manifold and 3 new rochester 2gc carbs and I am going to be very happy with it in my tr6 triumph going to lunch on Fridays

[flexjay]

For me, the 327 and 427 are my favorite Chevy engines, from back in the day !

[dannywilsher]

I had some mean 327's back in the 70's. With a four speed trans and a 4.56 rear... Wow, fun, fun,

[jamespeterson]

Back in 1965, my brother bought a 327 crate engine from Les Vogel Chevrolet in San Francisco. It was 375 hp. They said that it was one of 7 of these special crate engines to go to the the West Coast. We put that engine, along with a Muncie 4-speed with a .220 first gear in a 62 black Chevy Impala that my brother bought from my parents. He took it to the drags, and when he raced it, he was always twisting axles into barber poles and ripping them in two. Solved the problem by putting a 12-bolt Pontiac rear axle in the car. I have never heard another 327 that sounded like that one. It had a unique lopey rumble Idle. I have no idea what the real horse power of that engine was, but it would buzz 8500 RPM like it was nothing.

[Peter-V_]

Back in the mid 70's I had a 67 Chevelle with a 300HP 327 and Muncie 4 speed from a 65 Impala, by far my favorite hot rod car, it inspired me to power my stock car with a 327 too, never ran it on a dyno but it won several times against bigger engines, a bit of a mish mash of parts it was really reliable and just seemed to make a good amount of the right kind of power for short track racing.
To this day I still daydream about how much I like 327's, by far one of the best engine combinations (bore to stroke to rod ratio) ever conceived, you had to be pretty inept to not be able to make one run damned good.

[wisheye]

Gen 1 400 that’s my favorite small block Chevy

[johnvandenberg]

Had a 68 DZ302, just loved the sound, and would rev till the cows came home. :-)

[cuzz]

I built a 327 back in the 70's and into the 80's in my Vega. Like most guys I was running the double hump heads until I went all out and bought a set of the new Bowtie Aluminum heads with 2.05 intake valves. The difference was amazing..I was already running a decent Crane Cam and Victor Jr single plane intake and those heads woke the beast.

[elmerfudpucker]

My brother had a 1973 Nova we put a 350/350 in, stock. That car would run circles around just about everything else in town. This was in the mid 70s, and we had to doctor up the gas to run it, but it was a great running car. Eventually, we got a better intake, carb, and HEI ignition for it, and that woke it up a lot. Being a Ford man myself, I have always been impressed by that car.

[jimmy_olds]

Mine is the 400. I’ve owned 305’s, 307’s, 350’s, and 400’s and generally build my stuff for the street (and pickup trucks), the torque from the 400’s is my favorite. One of my favorite combos was with Vortec heads, a cheap summit cam (Sum1103), and rebuilt 400 bottom end. It just made a mountain of torque and pulled hard to 5500-6000... more than enough power for stop light to stop light driving.

[dudebud]

I grew up riding in a 1969 Chevy Impala 327 converted to a 4bbl, my mom loved cars, and I remember the power that little small block had. My favorite is that, although every other motor was amazing with the big 3. I currently own a 2016 GMC Denali with the L83 5.3, bought it new, all the 6.2 were gone, and with the factory Borla exhaust premium grade gas, it does far better than I expected. A 6.2 will just spin, and I’m off and it has to catch me.

[reevinriggin]

When ever someone says to me, "they don't make em like they used to" . My answer now is always the same. I say, "I know, they are making them way better" . Ha. I remember when the fuelie heads were the shit. Now, HP is easier than ever to make. Just think how good it would have been if you had the modern 4 valve heads and dual over head cams with VVT on 427 ci with EFI, back in the day.

Well, maybe not. The tires and brakes sucked pretty bad back then, too. Thanks again Richard!

[superprettyko]

I had a 67 Corvette, 327 / 300 horse, put 350 cam, lifter, springs, Edelbrock turanchler manifold, Holly 800 DP, distributor worked for 32 degree fast, ran good. This was back 1969 - 1974, Then sold the car. Now have a 1969 Nova 307 I will work on. This will be fun trying to get power to spare. Thanks for the video.