How do i find out how many horsepower the engine has. I understand the 327 had a 300 HP and a 350 HP. What is the easiest way to find out? All i know is it has a 350 exhaust manifold. Where are the numbers to identify the specifics of the engine? It is in a 1978 chevy c10
The best way to identify what the engine was originally is by the flat pad on the engine in front of the passenger side head. There will be a series of letters and numbers stamped on that if the block hasn't been decked before. I don't know if there is a site online, but several books available at the bookstore can decode it for you.
If the engine has all the original parts the pad on the front of the engine will tell you. However that is unlikely, as the heads, cam and mayby the pistons have been changed over the years. You can go to the below web site for numbers.
EG, there were also a 250, 275, and 375 Hp versions. All these versions were available to be installed into and Chevy product produced in 68 so Vette motors were only that if they were installed in Vettes. As stated before, the numbers are the best way to idnetify the BLOCK you have, but you will have to go internal to get the rest of the story. Head and intake casting numbers will help identify them. The valve train will help on the 300, 350 and 375 versions (350 and 375 had solid lifters). If the original carb is with the motor that also helps. The higher performance versions had AFB or Rochester 4GC. The exhaust manifolds were Rams Horn with 2.5" dumps. Out of couriousity, why do you think it has 350 exhaust manifolds?
The only numbers I found were on the cab side of the engine behind the carb. I don't remember what it was but at the time I matched to the 350 exhaust manifold from a website. Thanks for replying. I will check the carb. joe
There's probably no way to really know the HP. 327's varied in HP by the type of pistons, heads, cam and calibration, like pop-up pistons vs flat, solid or hydraulic cam. If the engine hasn't been rebuilt you can check the suffex letters (like EE) on the block like Kevin said then look them up in a old "Motors Manual" and that will tell how it left the factory and whether it was a stick or auto trans.
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