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Old 06-15-2005, 10:40 PM
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Big block ford 390/391

Whats the difference between these? I am having a hard time finding parts that will fit. Edelbrock website says:

"will not accept stock Motorcraft spread-bore carburetor or fit heavy-duty 361 c.i.d. and 391 c.i.d. Ford truck V8s."

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Old 06-16-2005, 12:44 AM
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You have basically two different engine series derived from the same family.

The FE is the one most are familiar with (332-352-361-390-406-360-410-428-427).

The FT is basically the same engine but built to power medium duty trucks. They (330-361-391) have steel cranks, larger distributor housing, governors, etc.
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Old 06-16-2005, 08:31 AM
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Most of your 361-391 FT blocks will be cast with more nickel in them and the main bearing webs will have additional webs cast into them. The FT cranks will be forged steel and will have a larger diameter snouts. The FT distributor hole will be larger than a standard FE. The FT blocks will all be tapped for four bolt motor mounts and the block will be tapped on the passengers side for hydraulic brakes(not sure on this one). The FT heads have small ports, valves and the intake manifold is cast to match these heads. A easy way to visually differentiate between a FE block and FT is the FT block will either have a reverse 105 cast on the front of it or there will be nothing cast on it at all. The FE blocks will have a 352 cast on the front of them.
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Old 06-16-2005, 07:14 PM
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Onebadmarc,

I am having troble finding a distributor and intake that will fit it, do you have any tips on finding one?
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Old 06-16-2005, 09:28 PM
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Summit and Jegs both sell a 4 barrel intake for the FE engines. Edelbrock makes a Performer and a Performer RPM Intake, Weind makes a dual plane intake also. The intakes will work only on a FE engines and will not work on FT Heads. If you have a FT engine, I would go to the local junkyard and pick up a set of C8AE heads off a late 60's 390 FE truck and put them on your engine. Then get a good aftermarket intake and a mid 70's FE Duraspark distributor and don't worry about trying to find the hard to come by FT distributor, or intake for your motor.
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