Alternatively you could use matching big block motor and frame mounts, but for all this extra expense and effort the engine will still be sitting in the same location. Olds varied compression ratio with the size of the dish in the pistons. Installing these larger valves should be standard procedure, even for stock rebuilds. See the chassis manual for a complete list of available configurations. Some engine are a narural for a blower, 426 Hemi for example. Then would pull a 50 foot trawl for 2 hour tows as many as 4 or 5 times a day or night. Obviously this is a generality, and you should run the numbers with actual measurements on your specific parts if you want to hit a certain compression ratio precisely, however I've found that just assembling this combo is more than adequate for a street-driven motor I'm doing just that right now.
If the shim is there on the 350, use it in the same place on the 455. Heads are pretty easy to swap as well. There is not a better method of sealing combustion than the copper head gasket with the proper O-ring and receiver grooves machined into the head and block. Use a roller timing chain. When milling your cylinder heads, make sure that the machine shop machines the deck surface parallel to the valve-cover rail.
Note: The big block is about an inch taller than the small block when measuring from the crank centerline to the carb flange, so even if you use matching mounts, the air cleaner and valve covers will be higher in the engine compartment. The big Olds kept on keeping on. If it doesn't have any number stamped at all, it could be one of two things. The deeper and more vital the part is in the motor, the greater the incentive to replace it now. The original motor mounts used on the earlier cars were simply two pieces of metal with rubber molded in between - there was no interlocking feature. Block When you have the block bored, try to find a shop that has a torque plate for an Olds motor but don't be surprised if you can't find one.
The story on the change from the early 400 to the 68-69 400 was due to design changes to start limiting emissions and with the longer stroke they picked up more torque which lead to more power at lower rpm. Typically it will be covered with a power steering bracket or something, below the number one spark plug location. I would replace all the lifters and any damaged or suspect pushrods, rockers, and bridges. The top of the covers are flat, like someone cut off the curved top. Here you are at our website. I have the window sticker, invoice from dealer and protecto plate and manual. Car will need body work and paint.
This method brings you pretty close. The Offy manifold is a little bit more up to date in airflow characteristics. I recommend not polishing intake side for better atomizing of the fuel. So give your heads a check with a set of vernier calipers to make sure that the deck surfaces are parallel to the valve-cover rail and the same as each other. The Toronado engine 1969 and 1970 was rated at 375hp, but in point of fact, it was a more mild engine than the base 442 engine in 1970. That same number appears on the Protect-O-Plate. Luckily, I saved all of my used ones and reused them by glass-bead cleaning them and gluing a.
However, since paint is easily changed, it should be used as supporting evidence, not as absolute indication of engine lineage. Others usually got smaller valves. Get big-block heads, mill the deck surface so you can get the combustion chamber volume, and presto! These gaskets are pretty much available in any thickness and bore size when you custom-order them. Block cleanliness cannot be stressed enough. By making the bore smaller, the surface area of the combustion chamber is, by definition, reduced.
Typically it will be covered with a power steering bracket or something, below the number one spark plug location. These gaskets basically consist of two layers of embossed hardened steel and a shim of desired thickness between. The bore centers are the same, since the only differences between the small-block and big-block Olds blocks are the deck height 9. Use a high volume oil pump and a Toro pan if you can find one. Also, 1971-76 heads codes G, Ga, H, J, K, and Ka all have induction hardened valve seats. All of the small-block combustion chambers have roughly the same shape, but vary in volume.
If you plan to do any porting at all, the J heads flow as good as any and are dirt cheap. © 1996 - 2000 by the members of the Oldsmobile Mail List Server Community. I have seen many heads that have been milled unevenly, which throws everything off. Nitrous 455 I ran a 455 with nitrous in a 1971 Cutlass. If not, it's a little tougher.
See the car in the Oct. If the motor has a number stamped which doesn't match the above, it's a non-original motor from another car. I can't wait to see what it does in a car that weighs 1k less. However, you have to pay for it in wear and tear. As a result, the big block cars, starting in 1969, got the interlocking design. Doing this you can get around 11. At a minimum go with the big valves.