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Big cam bell housing question

Posted By rpoore Monday, October 21, 2019 3:20 PM
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rpoore
 Posted Monday, October 21, 2019 3:20 PM
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Last Active: Thursday, December 05, 2019 3:55 PM
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I’ve got a 66 Pete that’s a toy/hobby truck with a BCII350 in it, the engine is tired and I have a BCII 475 that’s been turned up to 800 hp (at least what I’m told, for what it’s worth) that I’m going to put in the 350’s place. My question is the bell housing on the 350 is the older single bolt ridged mount style. Is this going to be an issue with a hot rod engine? I thought of swapping to the Peterbilt 3 bushing style bell housing from the 359’s. I’ve been told both ways that i will fight it and break the bolt constantly and I should swap to the newer 3 bolt style, but I’ve also been told that the single bolt style I have will be completely fine. What do you guys think?
Thank you,
Ryan
steeltracs
 Posted Monday, December 09, 2019 6:39 PM
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Last Active: Monday, December 09, 2019 6:25 PM
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The single bolt style will be fine till you let the clutch out with a load and are in a high torque situation and the bolt snaps. Change to the newer style and you should be ok. 800 hp ? 525hp would be a good setting for driveability.
Monday, December 09, 2019 6:42 PM by steeltracs
Hayes Clipper
 Posted 2 days ago @ 7:51 PM
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I had a 500 HP, E9 V8, in my 1989 Superliner. With 8 axles, depending on whether I was highway, or off-highway, my gross weights were 140,000 to 182,000 lbs daily. One of the shortcomings of that truck was looking up under the left rear motor mount and noticing the nut, washer, doughnut, and lower half of the bolt missing. Once a truck has this sort of issue, you check it for sure every weekend while greasing, and any other chance you might roll under there. I always carried a spare bolt, doughnut, and washer. The interesting thing is that I never felt the stick torque over towards the passenger seat, nor did the fan hit the shroud, or any rad hoses leak, or air filter piping show signs of moving.

So what is your definition of a toy/hobby truck? For going to shows and light cruising, the stock setup is likely OK, just use a good quality bolt in the left side. But, are you planning to hook up to a sled in a pulling event and work your 800 ponies? If so, then the modern heavy duty setup is the way to go.

If a run on a chassis dyno proves that you truly have 800 HP, then, for peace of mind, you can look at an old drag racer's trick. This would involve fabricating brackets at the left the rear of the engine, and the left frame rail, then connecting them with a length of good quality 1/2" chain. This should stop your engine from rotating out of the frame. How much fear, paranoia, and $$$ do you have?
2 days ago @ 7:53 PM by Hayes Clipper

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