I was wondering if my engine in my comet is a 289 or 302? Is came with a edelbrock proformer "289" intake. I know that intakes are interchangeble and it just migbt be a 302, but how to i make sure its a 289 or 302?
If you Comet was built in 1967 then it came with a 289...if it was built in 1968 or later then it is a 302. That is if nobody changed the engine. To know what you have you will need to remove the started to read the casting code then use the code to find the year and size of the block...or measure the stroke by removing a spark plug and use a drinking straw to measure with.
If it's a '71 or newer a partial VIN will be stamped on top of block behind intake... Last six digits will match the vehicle VIN and would be a 302 as 289 were discontinued after '68... Here's stamp on my orig '72 302... 2 is year & K is code for Kansas City assembly plant...
Unless someone swapped in a 289. 289's were dropped in mid 68. Only way to know for sure is to pull the oilpan and check the crankshaft numbers.
A '68 289 will have 289 cast in the heads, while having 302 in the block valley(I have one of these from a '68 Cougar)... Block casting is C8AE-6015-B, vs C8OE-6015-A for 302, Windsor built all the '68 289 while Cleveland built 302... The '68 289 was a full year engine option, dropped for '69 so Windsor could build 351... At the beginning of '68 model year, 302 was listed as std engine for Torino GT, Cyclone, Cougar & first engine option over 6cyl for Mustang... What's little known is the 289 replaced it in Jan '68, as Cleveland could not keep up with 302 demand... Why Windsor built 289 instead of 302 is a mystery, guessing retooling for the longer stroke crank was nixed by the bean counters... Besides the Cougar engine above, I've owned a C code '68 Torino GT, with a 289...