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RivNut last won the day on September 14 2017

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About RivNut

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    Riviera addict
  • Birthday 02/19/1947

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  • Location:
    NE Kansas
  • Interests:
    Buick Rivieras, Old Schwinn Bicycles, reading, traveling, teaching (retired)

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  1. Roberta, Your link takes me to the buick.com website. ?????
  2. Casting numbers usually are used over a period of years. Then when they go into final machining are the subtle year to year, model to model differences machined in. You can find out more about casting numbers on the Team Buick website. The casting number for your block shows "70 - 71 455" stamped numbers like the SF or SS INDICATE performance levels. My 70 455 GS was an SS engine. Funny thing about SS engines, in 1970, Buick rated them as 360 HP in an intermediate body but it was the same as the SF 370 HP in full sized bodies. Here's some "stamped" number info for 1970 engines. You have to read more into it than just the letters. As I pointed out above, the same engine developed different HP depending on the installaatioin. The SF Riviera engine is the same as the SS intermediate engine but rated at different HP. (Insurance purposes and probably some NHRA sanctioning details for classification) ENGINE CODE SA SB SF SO SP SR SS NO. CYL. 6 8 8 8 8 8 8 CID 250 350 455 350 350 455 455 HORSE POWER 155 285 370 260 315 350 360 COMP. RATIO 8.5:1 9.0:1 10.5:1 9.0:1 10.25:1 10.0:1 10.5:1 CARB 1BC 4BC 4BC 2BC 4BC 4BC 4BC Engines available as indicated: Skylark and 350 - SA,SO,SB,SP Sport Wagon and Skylark Custom - SO,SB,SP Skylark GS - SP Skylark GS455 - SR,SS Estate Wagon - SF LeSabre and Custom - SO,SB,SP LeSabre Custom 455 - SF Wildcat Custom - SF Electra 225 and 225 Custom - SF Riviera - SF Other "Big Block" Head casting numbers - Notice these could have been both 400, 430, or 455 applications 1231109 67-69 400/430/455 1231786 67-69 400/430/455 1233472 67-72 400/430 1237661 70-71 455 1238142 72-76 455 1238148 72-76 455 1238529 70-76 455 1238530 70-76 455 1240149 70-71 455 1241786x 70-76 455 1241860 72-76 455 1242445 72-76 455 1246322 72-76 455 1248922 72-76 455 1372963* 67-69 400/430 1377979 67-69 400/430/455 1382091 67-79 400/430/455 1382983* 67-69 400/430 1382985* 67-69 400/430 1384720* 67-79 400/430/455 1385649 68-69 400 * Big Port 1967-70 heads are 69cc, closed chamber. 1971-74 heads are 71cc, closed chamber. 1975-76 heads are 76cc, open chamber. In 1975 General Motors painted all engines corperate blue. A blue 455 is generally considered a more desirable motor to build. Here's a list of intake casting numbers 1231718 70 455 4bbl 1236403 71 455 4bbl 1239925 72-73 455 4bbl 1243020 72-73 455 4bbl 1244302 74 455 2bbl 1245059 72-74 455 4bbl 1245375 72-73 455 4bbl 1247330 75 455 4bbl 1299925 72 455 4bbl 1374062 67 400/430 4bbl 1376998 67 400/430 4bbl 1382720 67 400/430 4bbl 1383438 68 400/430 4bbl 1386003 69 400/430 4bbl 1386681 68 400/430 4bbl Stage 1 head casting numbers 1240150 1970 455 1240146 1971 455 1238530 1972 455 1242002 1973-74 455 The story behind these four numbers is in question! Let us know what you find as far as a head casting number. Hope this helps, From my experience with nailheads we've found that the casting numbers for the heads on the 4bbl 325 HP engine, the four barrel 340 HP engine, and the dual 4bbl 360 HP engine are the same. The only real identifying factor is the LT (401), LW, (425) or LX (425 dual 4bbl) stamped into the block. So you might have a Gran Sport that needed a head replaced. A head from a single four barrel 401 could be used and it would be the same. No machined numbers on the heads to differentiate. No matter where the head came from, you'd still have an LX motor. 400/430/455 heads were different. Ed
  3. Most of those lights I've seen have been mounted on the inner trunk bracing right in the center of the "X"
  4. Mike, I have a 64 cover that needs very little work on the shiny side but needs to have some work done on a bolt hole on the back. Get with me via PM and make me an offer. Ed
  5. Tom, Gloss or Satin black?
  6. I do this while the paint has yet to cure completely. I use the blue heavy paper shop towels dipped into lacquer thinner then stretched over the edge of a body putty spreader. Not wet enough to drip, thin enough to touch only the surface you want, and sharp enough for a straight line. Youll want to work on the bright finishes before painting. It makes clean up easier and you're not trying to polish something next to fresh paint.
  7. RivNut

    Mystery pipe

    Guess I missed that part. But, the pipe in question is the fresh air supply for a hot air choke. The Performer has the same diameter air horn as a Q-Jet so the spacer acts as a reducer so the air cleaner will fit. The easiest thing to do would be to bolt a top of an original type AFB to the Performer body. Peter, use the search feature on this forum to find previous articles on vacuum lines and carburetors. Pretty straight forward setup. Ed
  8. RivNut

    Mystery pipe

    Look at the face of the right front bolt pad and find the carb number. I'm suggesting this because I think that the carburetor on your car is not the correct one. The correct one would have the fuel inlet at the front. With the fuel inlet at the front, the tube about which you're asking, would connect to a nipple on the air horn and would supply fresh air to the hot air choke.
  9. RivNut


    Might make you Finnish before you get started.
  10. The centers are the same that were on the base wheel cover. Usually these don't get the abuse that the knock off centers fget. I may ha e been wrong about the color. The ore I see them, the ore I think they may be black. I think I have a couple of rough 64s in my stack. I'll see how far up the vanes the paint goes and get back to you. While I'm looking through them, I'll see what I have and what condition they're in. Ed
  11. If this engine was with a Dynaflow transmission, then you'll need to use the starter motor that's on your original engine. With the adapter, you'll use everything from the original car. The adapter is only needed so your flex plate will bolt to the crank hub. The nailhead is externally balanced so the flex plate is part of that assembly.
  12. What you've picked up is a set of base covers for an Electra or a Lesabre. Riviera co ers for 63 would have the same design, but the trishield in the centers would be all silver rather than red/white/blue. The centers are interchangeable IF you can find a set.
  13. RivNut

    Wth: 1964 riviera gas pedal

    Sears the archives. Someone found a reproduction that looks similar.
  14. If you're running 35 PSI and you're measuring it when you air up the tires after they've been sitting a while, they're considered cold. Driving heats them up and one of the laws of thermodynamics is as matter gets hotter it expands. Remember the brass ball and ring from your general science class? The air in the tire expands as it gets hot. As it expands, it exerts more pressure. 35 PSI cold could be 40 PSI hot. Kind of like riding on solid rubber tires. The jacking instruction label in your trunk specifies 24 PSI 'cold.' As you drive, the pressure will increase slightly to probably around 27-28 PSI. You should find that comfortable. (As long as you're not running an LT - light truck - tire which has a much stiffer side wall.)