thx guys 4 help
but what i know that my engine is not the original one cs
the vin number indicate that the original engine is 289 2v and a shifter only from 3 speed
while now i have one from 4 speed and a very powrful car so i don't think that this engine
is 289 !!
so how can i know from the engine it self his size
and is it a small or a big block??

 

Post a couple of pics. Let's have a look.

 

well i don't have any pic on the pc right now but i will try to post u someone as soon as possible

 

Your engine feels powerful, so you've ruled out that it's a 289? Got news for you friend - there are plenty of 289s that will plaster you to the seat back! What are you comparing it to that leads you to such a conclusion?

 

I see where you're going with that, and that was my original thought. But if someone bothered to put a 4-speed in it, it's likely a different engine. And 289's really aren't all that common to build up. Not that I'm ruling the 289 out, but it's probably pretty likely it's a 302 of some sort.

But we can guess at it all day. Lets take a look at a picture and go from there.

 

maybe u r right but there is any way to find out the size of this engine
cs someguys told me that he is 390 and other said that he is a thunderbird engine
i don't know and this is my first mustang and i'm restoring it and i don't know a lot about them
so i asked 4 help

 

do you have a stock intake manifold?

my stock manifold has a "289" stamped into it....see if yours says anything

 

dangit get some pics,lol. its probably a small block still but its possible to be a big block. my parts car came with a 302 when built but it was later swaped to a 351W, woot!. Some pics would help but not make it obvious. it of course could be a 289 HiPo, or just a modded 289 like said. if anything other than 289 im guessing 302 or 351W. Get us pics and we can all compare to our cars and tell you what the best guess is.

 

What year is the car? If it's a 66 or older, a 390 (or any FE) won't fit unless the shock towers are removed.

 

Actually.....swapping in a 4 speed was and still is quite common without doing anything else because of better off-the line performance.

I will don my karnack hat for a moment and predict

Wide ratio toploader
3.25 or 3.55 trak lok
289 with a performer intake, cam, and hipo manifolds.

Additionally.....building up a 289...is exactly building up a 302...since they are the same block...and essentially the same motor aside from a small stroke difference (or something like that)



Ohh boy I can't wait to see a pic.