[ghip]

I just purchased a 1966 coupe> The car does not hace the original motor. The person I bought the car from said that the motor was a 289. Not Sure? How do you really tell? There is a stamp on the intake manifold that says 289 but when we were doing a tuneup on the car, the marks and pointer on the engine pully dont match what a 289 should have. It has the marks of a 302. Using chilton book as my reference.

[Little Mule]

what's your vin?

[ghip]

vin # is6F07111470

[hypostang]

Got a digit missing in that vin , the engine code letter
But to answer your initial quandary the only way to truly tell a 289 from a 302 is to remove the oilpan and check the casting mark on the crankshaft forward counterweight a "1M" is a 289 a "2m" is a 302

[67ragtopStang]

Hypostang, doesn't the "1M" just tell you the crank is for a 289? It doesn't tell you it's a 289 block.

I think it would be easier and less messy to remove the starter and look for the engine casting number. Then, post it here.

Remove a valve cover, and you should see a "289" cast into the cyl. head.

It sounds like your intake may be aftermarket. I don't think Ford cast in "289" on the intake.

Your VIN should read: 6F07_111470 with an A, C, K, or T after the 7. A: 289-4V, C: 289-2V, K: 289 - 4V HiPo, and T: 200-1V (6 cyl).

[tbunker]

The only thing the VIN is going to tell you is if the car was a I-6 or a 289 because the 302 wasn't around at that time. Not until 67 or 68. What I suggest is getting the casting number off the engine block and putting that through google. That will tell you what kind of block it is (289 or 302).

[tbunker]

Ford did cast 289 on the manifolds. Mine has it on it and its a Ford iron manifold.