Just becuase it has D4TE does not make it an FT engine. It sounds like you just have a plain FE. D2TE heads were used on FE engines in light trucks. What kind of truck is this "391" in?

 

The FT engines use the large Dizzy its about 1/4'' larger opening in the intake manifold and the entire unit is higher by about 2.5''. It also uses 1/4'' drive gear instead or the standard FE 5/16''.

 

I agree, he's just got a std FE 390, not a 391. The telltale would be the huge front snout of the 391 steel crank. The block casting number doesn't denote an FT, as it was used on both engines. Heads for the FE 390 would be D2TE-AA.

 

Hell it could be a 360 as well. I had a 360 with D4 block and D2 heads. Did you check the stroke of the crank???? Its like a box of chocolates, you never know whats inside LOL. JMO

 

Okay this motor has a different harmonic balancer system than on my other 390. The front is extended about three or four inches from the end of the timing cover to make room for the front engine mounts on the engine. It is hard to tell it is a balancer because it is also a pully all together. Even though this came out of an f700 I am skeptical that it is a 391. The cab got scrapped so i could'nt get the vin number to see the actual code. Anyways some more info on the appearance, the oil pan is one of those pans that don't really have a sump. It's just one rectangular pan. The intake manifold has a large "T" cast into it on the side of it an the oil pump drive is 1/4" hex drive. Another really weird part is that the sticker on the valve cover, which is the original one and is halfway torn,(however there is the number 390 written on it but it dosen't look like it lines up with the displacement row going accross on the sticker) says it complies with 1976 emissions. This engine has a points dizzy on it. Why would a '76 engine have points on it unless it was swapped for some reason? One of the main things I am looking for is if it happens to be an FT engine, will I be able to use a regular fe cam and timng chain set? More info would be apreciated if you guys have any.

 

Also a 391 has a Governed Dizzy, and a iron timing cover.

 

what do you mean by governed dizzy and what is the heat crossover

 

The distributor has a governor on it. All most looks like a mechanical tack drive.

As for the heat cross-over is different on the FT then any other FE ever made. But you have D2 heads! Which is a normal, everyday, run of the mill FE stuff. Check the snout of the crank and measure it. 391's (including 361's) have a bigger snout out of any FE crank ever made. JMO

 

C4TZ-6312-A = 1964/72 391 harmonic balancer. Marked = C4TE-6316-A. Double sheave, 6 29/32" damper diameter; 7 7/64" pulley diameter. 5 7/32" long.
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D2TZ-6316-A 360/390 1968/72 FE harmonic balancer.
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As original. all 1964/72 391 engines had Holley 4 barrel carbs.

1968/72 391 Dizzy ID code = stamped on base of dizzy below rim of cap: C8TF-12102-B.

 

Now that you say that you haven't measured the bore or stroke you could have any number of FT/FE motors here. From the 330 to the 391. This includes the 330, 359, 361, 389, & 391 The 361/391 have the steel crank with the big front snout. The others had cast FE cranks but fitted with an FT balancer with a smaller i.d. for the smaller FE snout. The 330 bores are sub 4" but the crank is the std 352/360 unit. The 389 would have a cast 390 crank also with the big FT damper and smaller i.d. to fit.

 

Front engine mounts and cast-iron timing cover = FT - at least at first blush

 

This sounds like one of the later FT engines that came in UHaul trucks.

Tracy

 

Ok now it sounds like an FT engine the points would have been stock in 76 only the f-100-350 got duraspark ignition. Why would you want to run this engine in a truck? besides a F-500 or larger. It is a genuine dog of a motor and has the comnpression ratio of a lawn mower some have as little as 6.8:1.

 

Now that's funny

 

Supercharge It!!!!!!!!!!!!!!