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Thinking of buying an old city used f600,present owner claims a 390 with 5speed
transmission,and 2 ton dump.Do you think he meant 391I ,how would I be able to tell the difference?thanks
I understood the engine was not original, but reading thru posts i understood that the 391 was much preferred because designed for commercial use. Are you saying the distributor is at front for the 391 and somewhere else for the 390?thanks for the help.
390 and 391 were vertually the same engine, 391 was the H/D version. They both are in the FE family. If it's a rear mounted dist., then it's a 302 or A 332 y block engine. These had 2 studs on the valve cover to hold them down.Ram Horns exhaust manifolds, plugs under exhaust manifolds. These were available in the F600-900's.
There is also the 401, 477, 534 gas engines. These had bolts around the edge of the valve covers, front mounted dist., Very weird looking waterpump and flat exhaust manifolds similar to a 390/391. These were in the F-600-900's also.
Barry-are you saying there is no easy way to tell difference betweeen 390/391
with distributor location as previous post suggests? The fellow I'm buying this from said the engine was a 390 and iam hoping it is a 391. Are there any distinguishing features between 390/391?thanks
NO, there's no big detail to point out on these engines. 332, 352, 360, 361, 390, 391, 428 FE engines all physically look the same. It's all inside that makes up the difference. They all have front mounted dist., split head/intake, wide flat exhaust manifolds, If you set them on the ground, you couldn't tell which is which. If it has an FE engine in it, it's obviously a later transplant. You would have to take a head off and measure the bore and stroke to see which it actually is. I don't know what you're going to do with the truck, but the 390 (if that's what's in there) is one tough engine and can take alot. look on the side of the block and see what the casting numbers is. It should be 4 letters, then 6015, followed by 2 more. By that you can sort of nail down the approx. year it was. Unfortunately, Ford doesn't use engine numbers like GM to see what it is and when it was built.
Thanks Barry, that's pretty much what I figured- just wanted expert opinion to be sure. I'll be working this truck,but not every day or as a commercial vehicle,it needs some attention for sure- but the price is right and it's a cool truck!
Barry, you don't know your Ford engines. 302's have a front mounted distributor like almost every modern Ford V-8. It ain't no brand c engine with the distributor backwards where you can't reach it.
The 302 I was referring to was in a Y block series block,Larger trucks, not the modern 302 you're referring to. All Y blocks ( 239-272-292-302-312-332) had a rear mounted distributors. If you'd like to see a pic, I can send you one. Look in the older parts books( 57-63) It's right there. I didn't spend 20 years in Ford parts and not learn about these engines. I know more about these engines than you think I do!
Sorry to jump on you Rich, but you came across pretty loud with your first sentence. Alot of younger people think Ford never had a rear mounted dist. But, they did and it was a pain to adjust, just like Chevy's. Did you know Ford built 2 different 332's? One in the Y b;lock rear mounted dist., and in the FE series motor, which we all know was front mounted dist.
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