Although the blocks are the same the cranks where different on the mid 68 and earlier 4000 engines. Gas engines were 192 ci with a 4.2" stroke, diesels were 201 ci with a 4.4" stroke.
After mid 68 gas engines were ungraded to 201 ci.
Early 5000 gas and diesels were 233 ci, they where upgraded in mid 68 to 256 ci.
I grew up on a 850 gas 5 spd and loved that tractor, always started and ran good with plenty of power for it's size.
But the type of farming we did then plowing, working the ground for crops, haying, tending to and feeding cattle during winter months. That tractor was started and used everyday but Sunday pretty much year round.
Today I only have diesel Ford tractors, yes rebuilding a inj pump is costly but if one drains and changes fuel filters regularly along with making sure fuel cans or tanks are drained of water you'll rarely have issues with the injection pump.
Some of the tractors on this farm have never had the inj pumps worked on, others have for various reasons, but just like carburetors water is the main enemy of any fuel system, unfiltered trash is second.
To me diesel fumes or gas odors from a fuel loaded gasser will both have me opening the shop doors pretty fast.
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Today's Featured Article - Women and Tractors - More Views From the Farmer's Wife - by Teri Burkholder. The top ten reasons why the judges wouldn't let you participate in the stock antique tractor pull: Hey, this is stock! It came with that V8 in it! That "R" on my tires stands for "really old" not radial! Blue gas? We thought it was a pretty color! What wire hooked to my throttle?
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