Trying to ID what engine I have in my newly purchased 1965 Mustang

spearce

Member
Dec 5, 2024
14
6
13
California
Trying to ID what engine I have in my newly purchased 1965 Mustang. Previous owner passed away so I cant get much info. I know its a 302 that was put in here and a local mechanic shop told me it looks to be a late 80's Mustang 5.0 type engine. Any ideas or thoughts on the matter would be greatly appreciated.
 

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Welcome to :SN: !

Well, it certainly looks like the accessory drive is from the 80s-90s..... One thing that can get you in a ballpark is to see if the driver side has the clutch arm boss tapped. If it's not there, it's definitely newer. Another indicator can be where the oil dipstick is located. If it's in the timing cover, it's very likely older, but if it's on the side of the block it's newer. It's hard to say where the aftermarket dipstick goes from the picture. One last thing that I can think of that doesn't require a lot of digging, check the firing order. Older 302s have a 1-5-4-2 firing order whereas later model HO engines use the 351W firing order that starts out as 1-3-7-2.

1733417183892.webp


Beyond that, I think it'll take a little more digging. The casting numbers are above the starter, so pulling the starter and recording those numbers will tell you when the block was produced. You can also pull the valve covers and record the casting numbers there to find when they were produced.

I'm sure I'm forgetting or not thinking of other things that others may help with, but I think this stuff should be able to get you some info. :)
 
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Welcome to :SN: !

Well, it certainly looks like the accessory drive is from the 80s-90s..... One thing that can get you in a ballpark is to see if the driver side has the clutch arm boss tapped. If it's not there, it's definitely newer. Another indicator can be where the oil dipstick is located. If it's in the timing cover, it's very likely older, but if it's on the side of the block it's newer. It's hard to say where the aftermarket dipstick goes from the picture. One last thing that I can think of that doesn't require a lot of digging, check the firing order. Older 302s have a 1-5-4-2 firing order whereas later model HO engines use the 351W firing order that starts out as 1-3-7-2.

1733417183892.webp


Beyond that, I think it'll take a little more digging. The casting numbers are above the starter, so pulling the starter and recording those numbers will tell you when the block was produced. You can also pull the valve covers and record the casting numbers there to find when they were produced.

I'm sure I'm forgetting or not thinking of other things that others may help with, but I think this stuff should be able to get you some info. :)
A huge thank you for this information.
 
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Welcome to :SN: !

Well, it certainly looks like the accessory drive is from the 80s-90s..... One thing that can get you in a ballpark is to see if the driver side has the clutch arm boss tapped. If it's not there, it's definitely newer. Another indicator can be where the oil dipstick is located. If it's in the timing cover, it's very likely older, but if it's on the side of the block it's newer. It's hard to say where the aftermarket dipstick goes from the picture. One last thing that I can think of that doesn't require a lot of digging, check the firing order. Older 302s have a 1-5-4-2 firing order whereas later model HO engines use the 351W firing order that starts out as 1-3-7-2.

1733417183892.webp


Beyond that, I think it'll take a little more digging. The casting numbers are above the starter, so pulling the starter and recording those numbers will tell you when the block was produced. You can also pull the valve covers and record the casting numbers there to find when they were produced.

I'm sure I'm forgetting or not thinking of other things that others may help with, but I think this stuff should be able to get you some info. :)
I did confirm firing order 1 3 7 2 6 5 4 8
 
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