They were heavy duty marine and industrial engines, but some did find their wau into medium duty trucks. If I do anything to it the first will be checking out the spec's as far as bearings, cylinder, etc., then I'll probably go with a valve job, timing chain and/or gears, rings, and anything else that don't check out.I wasn't sure if anyone might of tried an upgraded manifold and headers in one of these applications.
The only real pro to using the tall deck on a street engine would be if you're going for big cubes (600+), otherwise, it's just extra weight. If you really wanted to wake it up you might think about finding a set of oval port heads and then go with a high performance intake, carb. Looks like a vacuum leak waiting to happen.Yes, because of the taller block deck, the heads are a little farther apart on the truck 427's. Tri-Y style headers would be good along with a crossover or X pipe. The big trucks used the round or 'peanut' intake port heads, great for low R.P.M. In 1968, a new 427 cubic inch V8 engine and 23,000 lbs rear axle options for …
Your truck should already have electronic ignition (HEI), so no real room for improvement there. Had to run it like a detroit, keep it wound up when loaded (10 ton in the bed or 13 tons on the trailer).
I wouldn't expect earth shattering improvements. Was sort of fun to drive, but 4.5 mpg was a good day. If it were me, I would continue with the 400 build. The heads can only flow so much and thats why these engines have so much low end power.Changing the heads will get you more top end power but you will lose it in the bottom.
A modern electronic ignition will help. The truck is a gutless pig your contantly shifting the 2spd with a load the truck barely does the speed limit of 60-80km/h.89 F-Superduty 7.3 N/A 5spd 319,000kms 12x8 flatdeck. I do have a '89 GMC 7500 with a 427, and I have been around a truck 427 that had a cam change, intake, distributor and a 750 Holley. The Chevrolet Kodiak and GMC TopKick are a range of medium duty trucks that were produced by the Chevrolet and GMC divisions of General Motors from 1980 to 2009. We picked up a 427 Tall Deck the other day for $250.00 everything except flywheel and harmonic balancer. It seems like it would be more economical for Ford to have used their 460?93 F350 7.3L IDI Turbo, 4X4, Crew Cab, 5-speed, 3:55, stock, 100K miles;In med duty trucks, a gasser engine will usually spend a lot of time revving to do the job. Ours had two thermostats to give you one difference....The block deck height of the 366 and 427 Chevy Big Blocks is taller to accomodate 4 ring pistons.
What kind of performance gain you would get is debatable. Chevy C60 tandems were powered by 366 V8 gasoline or DH-478 diesel engines. Your best bet is probably to find a diesel school bus to rob the drivetrain out of. Tandem rear axle assemblies with ratings of 30,000 or 34,000 lbs. Piston speed and travel distance being lower will mean it should last longer and be more durable.
For a better experience, please enable JavaScript in your browser before proceeding.I was wondering why I see medium duty Ford trucks with gas motors using the 429 (7.0L) vs Ford using their 460 (7.5L)?
I had forgotten about the restrictive heads on those. The bore and stroke of the 'truck' 427 is the same as the old car 427, the 366 is basically a .125 underbored 396. There were a few tall deck 454's built some years. it save him lots of cash to not have to buy 496 pistons. Many MACK Truck Engines are added daily. GM did make a few 500+ cid crate engines based on that block, also the DRCE pro stock block is based on it. Has anyone ever tried this before in a medium duty truck or is it a waste of time and money? Tried to use it to pull a 38,000lb trackhoe, and it was awful. I am like Jim most truck engines have small valves and a lower compression ration piston and a small port carb.I put togather a truck one time for a man and he used a big bore chevy engine and it was a hot rod car engine with headers and a big 4 barrel carb.
With all of the great advice, stock will be the deal. Not much gain, so rebuilt the engine and added a Edelbrock intake and carb. swapped the 5 & 4 transmission for a 13 speed to see if that would help. MACK Truck Engines For Sale. The 429 is the same bore but has about 1/4 inch shorter stroke than 460.
With a 5+2, I got to the point if it was running right, it sounded like a detriot with a 13 speed.
You might want to look at the cam at the same time. The 427 truck engines don't tolerate a lot of initial timing but it should be in the 4°-8° range. Thanks for your input!We have an 1981 GMC 7000 dump and we just found a rebuildable 427TD and I was wondering if maybe we should go with headers and a performance type intake?I am not familiar with GM motors enough to know if there is a difference in the bore/stroke of your engine from other 427's. torque and not much else. It ran better, but not much gain. This doesn't sound like much but it does make a difference.2015 F350 Platinum Max Tow What a beast with the 4.30 gears! They were heavy duty marine and industrial engines, but some did find their wau into medium duty trucks. There were a few tall deck 454's built some years. Headers, if you do it you want some pretty heavy guage metal and headers configured to add torque. if it is a truck tall deck 427 then you can take and install a 4.25 stroke bbc crank and stock 454 pistons then run a 6.385 rod i think . I have a '69 Chevy tandem dump with a 427.
I would set the initial up a few degrees and then see if the popping is still there if it is I would be looking at valve train problems.
Whatever intake manifold you use be sure it matches what ports you have. Looking for a newer F-Superduty I just can't get over the feeling a F-350 is too light duty for the work. Although the stock cast irom intake weighs about 90 lbs and an aluminum one only about 20.This will be a work/hobby truck. JavaScript is disabled. with vacuum-hydraulic or full-air brakes. Re: 427 tall deck dump truck engine???
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