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#1 |
Registered User
Join Date: Mar 2013
Location: McPherson, KS
Posts: 96
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Anyone ever put a 427 in their 67-72? Pics!
Hi guys, haven't posted in a while.
I'm getting so fed up with this 250... I've dumped way too much money into it and had never-ending issues, only to have it now start dieseling and backfiring through the carb, as well as my headers not sealing properly against the head even with the $50 Remflex gasket sandwiched in between. Any advice there with any of that? So, in a fit of frustration, I hopped on Craigslist to see if there was anything available for relatively cheap that I could throw in my truck... And I found a completely stock, looks like fairly recently gone through (it's painted lime green with black valve covers) 427 - for $400. Everything is there but the intake manifold and headers, he's even got a brand-new Edelbrock carb sitting there with it. Ran when pulled, no smoke, no knock. Casting # is 3999294, according to websites it's a tall deck, 4-bolt main. So... should I jump on it? I want to know: - would it take custom engine mounts? - what headers would fit? - can I just pick up a cheap 454 intake manifold and throw it on top? - would the New Process NP435 that's in my truck right now bolt up to it and hold the power it's making? Thanks in advance!
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'71 Custom-10 ![]() Rat rod build: 1949 Crosley Station Wagon body on 1993 Dodge D350 chassis, Cadillac 500 powerplant. |
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#2 |
Registered User
Join Date: Apr 2015
Location: East Tn (In the heart of the Smoky Mtns)
Posts: 1,868
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Re: Anyone ever put a 427 in their 67-72? Pics!
It's a large truck engine. With the tall deck you're going to have a hard time finding a performance intake manifold. That's probably why the carb is just sittin on top.
IMHO, not worth the hassle |
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#3 |
Senior Member
![]() Join Date: Dec 2011
Location: Reading,Pa.
Posts: 440
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Re: Anyone ever put a 427 in their 67-72? Pics!
my 2cents only......stay away from this deal..more headaches than its worth.that 400$ will turn into 1500$-2000$ if not more before it hits the road.He says it ran,400$,tall deck..all red flags.Your best bet if your looking for a reasonable replacement to your 6 to keep you on the road....check on craigslist close to you for a low mileage 350 that you can possibly hear and check out before pulled,,,easier swap...easier on the wallet...there is a reason its for sale for 400$,don't make it yours........trust me
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#4 |
Registered User
Join Date: Jul 2002
Location: St. James, MO
Posts: 1,239
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Re: Anyone ever put a 427 in their 67-72? Pics!
The tranny will live just fine back there. There is no need for a performance manifold: just get a stock one.
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'69 Longstep K-10: 327/SM465/T-221/Closed Knuckle Dana44/12-bolt. |
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#5 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Anyone ever put a 427 in their 67-72? Pics!
Its the dual thermostats that will drive the price up. I had one in a 73 suburban and it was nice.
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#6 |
Registered User
Join Date: Jun 2013
Location: Somewhere
Posts: 3,073
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Re: Anyone ever put a 427 in their 67-72? Pics!
SBCs are everywhere at the pick a part, but BBCs, aren't. So if you need accessory brackets and pulleys to get an alternator, PS pump, and water pump working, you can spend time and money making it happen. People are proud of big block parts too.
You may want to look at the rear gear ratio as well. Steep gears and a BBC will drink a lot of gas. |
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#7 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,717
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Re: Anyone ever put a 427 in their 67-72? Pics!
Headers are outrageously expensive...
I've got a tall deck 496 that is in the shop that will some day reside in my Camaro and the exhaust is crazy high dollar. About $900. Rebuilding a low deck 427 for my 69 short step now. Hopefully that a little less high dollar...
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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#8 |
Senior Member
![]() Join Date: Dec 2011
Location: Reading,Pa.
Posts: 440
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Re: Anyone ever put a 427 in their 67-72? Pics!
2 more cents...i would feel more comfortable if i had heard engine run.A swap is not a problem but a few things to consider..you will have to invest some coin to get it in and fired up.If big truck oil pan is still on it will have to be changed out to a regular lets say a 402 pan for clearance.Early tall deck distributors did not have vacuum advance so you will have to search out a later model..they are almost 1/2"taller than a regular small/big block distributor.Headers could be an issue due to the fact they will bolt higher and stick out further than the low deck..have to notch frame for clearance.Manifolds make swap easier.Low deck intake will work with aftermarket spacer kit.Hopefully all accessories are with,pulleys,brackets,etc.as they are specific to these motors.research starter and flywheel also as this needs to be considered.The swap i was involved with was bolted to an automatic..to me it is a lot to consider and spend on a motor like this..good luck with your project...Rob
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#9 |
Registered User
Join Date: Apr 2010
Location: So Cal
Posts: 1,436
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Re: Anyone ever put a 427 in their 67-72? Pics!
Until you find something else....
>> issues, only to have it now start dieseling and backfiring through the carb, as well as my headers not sealing properly against the head even with the $50 Remflex gasket sandwiched in between. << Not wanting to search your other posts, be sure you remove the short pins on each end of the heads and replace with threaded studs. The holes are already threaded. You should already have two threaded manifold studs. Replace all bolts and pins for a total of eight threaded studs. Eight studs, the CHEAPEST gasket you can find and DO NOT over tighten. Expensive, layered gaskets are crap and will leak on your 250. Look for a gasket like this MerCruiser gasket. http://www.marineengineparts.com/exh...ld-gasket.html http://www.oreillyauto.com/site/c/de...2262&ppt=C1980
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'67 GMC 2500, 292, 4spd, AC |
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#10 |
Post Whore
![]() Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,100
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Re: Anyone ever put a 427 in their 67-72? Pics!
Here is another tip for your headers. Most headers are not ground flat and true on the sealing surface so the bolts will never pull them down to seal. I always take my headers and true them up on a large belt sander. This gets all the contact surfaces in the same plane. With your six cylinder headers you may need to find someone with a four foot sander. They are common in cabinet shops, but cabinet makers are NOT real fond of sparks.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. ![]() RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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#11 |
Registered User
Join Date: Jan 2011
Location: Chattanooga, TN
Posts: 2,149
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Re: Anyone ever put a 427 in their 67-72? Pics!
Stay away from a tall-deck. Probably has a bajillion miles anyway. You can probably find a late 454 complete for about the same money. BB stuff is not doing what it was 10-20 years ago. In the early 90s I sold all the BB stuff I had for top dollar to a guy who was spending his retirement money on BB parts. Now he has some desirable stuff, but I don't think he will keep up with inflation.
If it was me I would put a tried-and-true small block in it or an LS. Way too much hassle to put in a BB that wasn't there-especially a tall-deck.
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'83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project |
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#12 |
Registered User
Join Date: Mar 2013
Location: McPherson, KS
Posts: 96
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Re: Anyone ever put a 427 in their 67-72? Pics!
I would, but everyone and their grandma has a small block. That's why we got a 500-cubic-inch Cadillac engine for our rat rod project.
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'71 Custom-10 ![]() Rat rod build: 1949 Crosley Station Wagon body on 1993 Dodge D350 chassis, Cadillac 500 powerplant. |
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#13 | |
Registered User
Join Date: Jan 2011
Location: Townsend MT
Posts: 1,725
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Re: Anyone ever put a 427 in their 67-72? Pics!
Quote:
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#14 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Anyone ever put a 427 in their 67-72? Pics!
Why don't people buy these tall deck motors and build massive strokers out of them?
Do you run into some other clearance, like rod-cam, before you run out of deck height? Because if nothing else you should be able to build the same strokers you can with a normal block but run a much better rod ratio. It would seem like these should be the hot ticket for big-cube motors, but it never seemed to work out that way, and I always wondered why.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#15 | |
All about them K’s
![]() Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,373
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Re: Anyone ever put a 427 in their 67-72? Pics!
Quote:
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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's ‘87 IROC-Z all original 50K mile survivor TPI 305 IROC Blue ‘10 Camaro 2SS/RS Aqua Blue Metallic #93 -version 2.0 ![]() |
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