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Ive heard all kinds of things about the different year blocks. I have an 85 roller and a 89 roller. which is better?
 

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Both the same as far as strength goes. Not sure, but the 85 may not be tapped for the lifter hold down for roller lifters.
 

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The 85 is a roller block? I didnt think they had roller blocks in 85. If you have a flat tappet 85 block vs a roller 89 block the difference with the same setup would be about 20-30 horsepower and a longer life in favor of the 89. The roller lifter allows the cam to have a longer arch on it causing valves to stay at max lift longer producing more power. In order to put a roller cam in a non roller block you need to either have the lifter ports ground down to allow the use of the spider, or use special roller lifters that have a link bar on them keeping them from turning.

Hope I was right on all that.
 

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85 mustangs had roller cams(blocks), if im remembering right and i do believe it was the first year for mustangs
 

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yep i was right 85 mustang first year of roller cam, I should have know for a fact do to me owning an 85gt, but i pulled this out as proof any ways



Another new grille design came along for the 1985 model year featuring a single large slit between the two pairs of headlights. The GT was treated to a new set of 15-inch cast-aluminum wheels shod with P225/60VR15 Goodyear Eagle "Gatorback" tires, and thanks to a serpentine single belt accessory drive system and revised roller cam, the 5.0 HO engine was now making a full 210 horsepower in four-barrel carbureted form.
 

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heheh a FULL 210! Wish we were back in those days when 210 was alot. Hell the new scion has a 190hp naturally aspirated 4 banger this year. The mustang V6 is at 300hp. gonna take alot to get my 83 up to par with a new gt LOL.
 

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well the 84gt mustang only had like 165hp so it was a good jump in power...lol
 

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mines a 83



Production Numbers:
66B 2dr Sedan: 33,201
61B 3dr Hatchback: 64,234
66B 2dr Convertible: 23,438
Total: 120,873

Available Engines:
2.3L 2V 4cyl 88hp
2.3L EFI 4cyl 145hp (Turbo GT)
3.8L 2V V-6 112hp
5.0L 4V V-8 175hp <---- Gigiddy gigiddy!
 

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So the 83 was the first 5.0 HO, and the 1st year to offer the T5. Mine however Has a 4speed in the trunk. doubt ill use it.
 

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So the 83 was the first 5.0 HO, and the 1st year to offer the T5. Mine however Has a 4speed in the trunk. doubt ill use it.
naw...82 first H.O...if you really wanna call 157 Horse power an H.O.......lmao
 
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