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#1 |
Registered User
Join Date: May 2000
Location: Mexico, NY, USA
Posts: 73
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#2 |
Registered User
Join Date: Mar 2000
Location: Blue Ridge, Tx
Posts: 1,172
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You can find most of the info you are looking for on www.mortec.com
All big blocks had guide plates an screw in studs from what I can remember. Good luck with the BB! ![]()
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Fawker Fab three seater rock crawler buggy 498 BBC/SM465/203/205 doubler, propane, 5.13's, 42" PB Rockers '66 C10 - The new hot rod '77 3+3 Dually - 12 valve 4wd conversion tow rig project '28 Ford 2 door sedan street rod RevLimit Offroad "Hang on beer, we can do this." |
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#3 |
On the road
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Location: NATCHITOCHES LOUISIANA
Posts: 818
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Not sure if this is true, but originally if it had hi perf pass on it was because it had 4 bolt mains, but also it had extra oil passages for installing a remote oil cooler, (plugs just above oil filter) and I think they continued to put this on blocks that had the passages even though they did not have 4 bolt mains. Could be wrong on this but I have an old factory engine building guide that stated this about the oil passages. I've never bothered to check it on any later blocks as I've never run a remote oil cooler. Back in the old days when they ran big blocks in Nascar and road racing and such I guess they needed the cooler.
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#4 |
Registered User
Join Date: Oct 2003
Location: Carmichael, California
Posts: 3,006
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i had a couple big blocks in the past that said hi perf pass on them and they were both 2 bolt mains. the oil plug thing rings a bell but i can`t remember what it ment.
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Anthony |
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#5 |
On the road
![]() ![]() Join Date: Jan 2004
Location: NATCHITOCHES LOUISIANA
Posts: 818
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Oh yeah, I forgot to mention, those "045" heads, (if memory serves) should be the "good" open chamber oval port, w/2.06 and 1.72 valves, 119 to 120 cc's. These can be turned into a pretty good head by going to the larger 2.19 and 1.88 valves and mild porting. Not hard to pull 500 horse out of a 454 with the right mods with these heads. They used to be Lingenfelters (sp)heads of choice for street strip big blocks in the 80's before the boom in aftermarket heads.
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#6 |
Registered User
Join Date: Mar 2000
Location: Blue Ridge, Tx
Posts: 1,172
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I have two 396's that are stamped with the High Perf. and both are two bolts. From what I understand and have seen is that the HP blocks DO have the oil cooler holes machined into the block, but had nothing to do with whether it was a four or two bolt block.
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Fawker Fab three seater rock crawler buggy 498 BBC/SM465/203/205 doubler, propane, 5.13's, 42" PB Rockers '66 C10 - The new hot rod '77 3+3 Dually - 12 valve 4wd conversion tow rig project '28 Ford 2 door sedan street rod RevLimit Offroad "Hang on beer, we can do this." |
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#7 | |
Registered User
Join Date: Mar 2000
Location: Blue Ridge, Tx
Posts: 1,172
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Quote:
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__________________
Fawker Fab three seater rock crawler buggy 498 BBC/SM465/203/205 doubler, propane, 5.13's, 42" PB Rockers '66 C10 - The new hot rod '77 3+3 Dually - 12 valve 4wd conversion tow rig project '28 Ford 2 door sedan street rod RevLimit Offroad "Hang on beer, we can do this." |
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#8 |
On the road
![]() ![]() Join Date: Jan 2004
Location: NATCHITOCHES LOUISIANA
Posts: 818
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I stand corrected, that's the ones I was thinking about, matter of fact I have a set but was too lazy to go to the shop and look.
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#9 |
Registered User
Join Date: May 2000
Location: Mexico, NY, USA
Posts: 73
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Thanks Guys for all the helpful info, I got more out of your posts than I did from a ton of other sites on the net. Hey 67SS396 Do you have any suggestions how I could wake those heads up to make them a more desirable head if possible?
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#10 |
Account Suspended
Join Date: Jan 2004
Posts: 129
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pass
I own a 427 with "pass" castings.
I've understood "pass" castings refer to passenger car versus truck.Makes sense to me since 427's were only offered in passenger cars. IMO |
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#11 |
Registered User
Join Date: Jan 2011
Location: Townsend MT
Posts: 1,725
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Re: pass
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#12 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Got a Big Block Question?
Seriously ancient thread, but in case others wind up here:
All big blocks said "HI PERF". PASS meant passenger or truck, but I've never seen a truck motor. Since I've never actually seen anything other than PASS, I can't confirm there's anything else. I'd imagine even if there were truck motors so stamped, ours would be passenger car blocks anyway. I did see a 366, extra-ring, school bus motor and it was stamped HI PERF but I don't know about PASS. I've owned a 396 2-bbl rated at (wait for it!) 265hp, gross. It was also stamped HI PERF. So, HI PERF really just seems to mean "not a small block".
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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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#13 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,628
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Re: Got a Big Block Question?
[QUOTE
I've owned a 396 2-bbl rated at (wait for it!) 265hp, gross. [/QUOTE] I bet it wasn't in a 66 Pontiac though!! |
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#14 | |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Got a Big Block Question?
Quote:
No, 69. According to Wikipedia the 265hp 396 was available from 1961 on, which is clearly wrong. Pretty sure 67-69 only, and maybe 1970 as a 400.
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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 |
On the road
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Location: NATCHITOCHES LOUISIANA
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Re: Got a Big Block Question?
This is a old thread I don't even remember it.
I have seen 366 blocks and heads with "truck" cast into them as well.
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Mike Castro- 72 SWB. Ochre and White. 496/400 turbo, GV OD ,Dakota Digital dash , tilt, Vintage Air, PS, hydro boost, factory buckets, console, QA-1 Coil over suspension, 20/20"Billet Specialties Magnetos 72 SWB. Med blue. 454/400 turbo, tach, tilt, Stock AC, PS,PDB, factory buckets, console, ECE 4/6 drop w/ 2" blocks and C-notch, 20/20"Coys- Crashed and destroyed by drunk driver Sept 2019. New 72 build in the works. My new build thread "Castro" https://67-72chevytrucks.com/vboard/...d.php?t=820934 My old build thread, the blue truck http://67-72chevytrucks.com/vboard/s...d.php?t=271489 www.louisianaclassictruckclub.com |
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#16 |
Registered User
![]() Join Date: Oct 2011
Location: jackson michigan
Posts: 755
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Re: Got a Big Block Question?
I like big blocks and i can not lie.
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#17 |
Senior Member
![]() Join Date: Jan 2002
Location: Williston, ND
Posts: 2,999
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Re: Got a Big Block Question?
I was under the impression the 2 bbl 396 was 69 only for passenger cars
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68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi |
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#18 |
70+ ( Old Skool Club )
![]() Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,118
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Re: Got a Big Block Question?
I guess I should pull a valve cover and see which heads I have on my 396. My block casting number is 3902406 which according to MorTec is from 1967 and a 2 or 4 bolt main and I've never had the pan off so don't know which it is. My intake casting number is 3883948 and it too is for a 66-68 Oval Port Q-Jet off a 396/325 HP or ( and I wish I had this mill ) a 427/385HP. I am thinking the weak spot on my engine is the exhaust manifolds because they are from a 1973 454 Cop car engine and in that year I'd be surprised if the 454 had more than 250/275 hp. Like on a Mopar is the serial number of the car my engine came out of stamped on the block anywhere?
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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#19 | |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,628
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Re: Got a Big Block Question?
Quote:
IIRC 66 was the first year for a 396 in a canadian pontiac. We got the chevy motors in our pontiac's up here. I know the location of a 69 pontiac 4 door hardtop that still has it's factory 427/385 horse motor with turbo 400. All intact including a trailer towing package. Remember, it's a secret. We don't want you big block luvin' guys coming up here and haulin' our poncho's back south. LOL!! |
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#20 | |
70+ ( Old Skool Club )
![]() Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,118
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Re: Got a Big Block Question?
Quote:
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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#21 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Got a Big Block Question?
Two things:
1) 68250 is correct because he specified 2bbl. There were 4bbl engines 66+ but so far as I can find 1969 was the only year for the 2bbl 396. 2) There was no 427/385 - it was a 429/390. Or it was stickercharged. But yes, the L36 is the same as the Corvette L36. The "worker" engine you'd want for a wagon would be the 427/335. Our cars (Canadian, at least on the prairies) were such poverty cars compared the the US. You could option them up, but almost no one did. For example, in a 1969 2+2 the base transmission was 3 on the tree. With a console. The "shifter block off plate" is hard to find! In the US, by mid-year the base engine in the US Bonneville was the 428. In Canada the base engine on the Parisienne was the 250 straight 6. I guess that's probably more because they followed the Impala mechanicals and those were probably what the Impala line had as well.
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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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#22 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,628
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Re: Got a Big Block Question?
All I can tell you is I rode in a 66 396 2bbl 3ott pontiac laurentian when I was 15. A red 4 door sedan. Definitely a 2 bbl cause we flipped the air cleaner lid for that air rush. Wasn't hard to tell what carb it was.
I started tinkering on all kinds of stuff when I was 10. New the difference between 2bbl's, 4bbl's, bbc's, sbc's, old hemis, and even a S.O.H.C. 427 Ford. Helped install a new set of timing chains on one. I had a date coded 396 2bbl 67 motor that I rebuilt for my chevelle. Pulled out of an unmolested one owner wrecked pontiac. I knew the car from new. The 427 was a 385 horse motor. Sticker on the air cleaner too! Quadrajet carbed too! You could buy most anything you wanted back then. The dealers would order it for you. Buudy's dad had a 68 Laurentian 4 door with a 327 and 4 speed with a 4.10 geared trailer pkg. Used to pull his boat to the lake. Another guy we knew ordered a 70 SS chevelle 454 LS6 4 gear with a trailer tow pkg and 2.73 rear gear. Back in the day you could get anything you wanted up here in the north. |
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