Engine options for a '66 F100
#1
12-10-2018, 09:30 PM
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Engine options for a '66 F100
I'm in the homework stage of figuring out what's the best engine replacement option for my '66 short bed. It currently has a tired 352/c6 and I'm looking at three different engine options and I figured I'd see what you guys think would be the best option. This truck is a cruiser and I'd like for it to perform better than average. I currently have a 1985 F250 2wd parts truck with a good HO 351w/c6 (crappy heads, flat tappet cam, low compression pistons) but it's a good running engine. The other option is An 84,000 mile 5.0 out of a 1994 mustang GT.(E7 heads, HO mustang roller cam, owner can install an Anderson N21 cam and 1.7 roller rockers). The last option being a 5.0 out of a 1996 ford explorer (f4te truck cam, GT40 heads). Whichever engine I go with, I'll be using a c4 transmission since it's lighter weight and has a lot less parasitic loss than a c6. What would be the best engine
For my set up?
For my set up?
#2
12-11-2018, 09:36 AM
The 351w is the better option, it'll need better heads and more compression but with that done it will give you the kind of power you want. A 5.0 can deliver the same HP but building it to do so makes it a 90lb weakling at typical cruising rpms. The specs for the Anderson N21 says.. " Recommend 3.73 to 4.30 gears. rpm range 2600-6200, needs 2800-3000 converter" and that's in a 3000lb car, the same motor in a 4000+ lb truck will require even more gear and a higher stall.
#3
12-11-2018, 12:34 PM
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The 351w is the better option, it'll need better heads and more compression but with that done it will give you the kind of power you want. A 5.0 can deliver the same HP but building it to do so makes it a 90lb weakling at typical cruising rpms. The specs for the Anderson N21 says.. " Recommend 3.73 to 4.30 gears. rpm range 2600-6200, needs 2800-3000 converter" and that's in a 3000lb car, the same motor in a 4000+ lb truck will require even more gear and a higher stall.
#4
12-11-2018, 09:55 PM
Yes.. stock heads on these 351s are really much too small for this displacement, the stock pistons have a considerable dish but the heads also have 69cc chambers so swap on something with 58-62cc chambers and static CR jumps to 9:1 or a little better(from 8.3). With a cam that has as little as 260 something total duration and .450-.500" lift you'll have 300hp or more and a really broad powerband.. no high stall necessary.
#5
12-11-2018, 10:17 PM
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Yes.. stock heads on these 351s are really much too small for this displacement, the stock pistons have a considerable dish but the heads also have 69cc chambers so swap on something with 58-62cc chambers and static CR jumps to 9:1 or a little better(from 8.3). With a cam that has as little as 260 something total duration and .450-.500" lift you'll have 300hp or more and a really broad powerband.. no high stall necessary.
#6
12-11-2018, 10:49 PM
#7
12-12-2018, 10:50 AM
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Heads with the smaller 1.94" intake valve will clear the pistons so Eddy Performers, Dart Iron eagles, any AFR or TFS. Linkbar roller lifters are good, they are a better option to get a roller cam in an older block than drilling the valley for a spider or using a small base circle cam.
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#8
12-12-2018, 02:19 PM
Why not just rebuild the 352 and stroke it while you're at it ? You'll spend less money and end up with a 445 cube engine than you will doing an engine swap here. I've seen one guy who swapped out a 352 for a 302 and he ended up spending enough money to have bought a second truck in a 67 F100. Everything needs to be changed here. Motor mounts, frame stands for the mounts, transmission, linkages, exhaust, you name it it's gotta go to swap in a small block. You could even stroke it to a 390 if you don't want to go bigger. Just needs a .050 overbore and the crank, rods and pistons.
#9
12-17-2018, 06:05 PM
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Why not just rebuild the 352 and stroke it while you're at it ? You'll spend less money and end up with a 445 cube engine than you will doing an engine swap here. I've seen one guy who swapped out a 352 for a 302 and he ended up spending enough money to have bought a second truck in a 67 F100. Everything needs to be changed here. Motor mounts, frame stands for the mounts, transmission, linkages, exhaust, you name it it's gotta go to swap in a small block. You could even stroke it to a 390 if you don't want to go bigger. Just needs a .050 overbore and the crank, rods and pistons.
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