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Old April 16th, 2018, 11:20 AM   #1  
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another 455 thread

I am putting my big block in a 79 Cutlass.
I have less lofty goals than others. Got a Toro 455 complete from an RV and got to hear/see it run. I found a good aftermarket intake for it, W/Z manifolds, am re-using the starter and HEI distributor from my 260, and got the correct oil pan and motor mounts to make it fit in there. Hopefully I have it all covered.


I plan on having some head work (J heads) done too, and figured since it's all apart, maybe the rear main seal too.


So I'm looking for an engine gasket kit and an intake manifold gasket. I see a couple different part #s for 455's, so I'm wondering which ones people recommend. I'm thinking FelPro, and something about Mr. Gasket kits has me thinking "stay away."

Also, would appreciate any recommendations on any head bolt and intake manifold bolt kits.

Thanks!
Tom

Last edited by 71Cruiser; April 16th, 2018 at 11:39 AM.
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Old April 16th, 2018, 01:23 PM   #2  
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Check out Joe Mondello racing. He has a nice 3 piece intake kit that worked wunders for my project. Easier install with runner seperate from the valley pan. If you do the rear main seal I would look at the timing chain and gears. Originals had the crappy plastic toothed gears.

Has entire engine gasket kits down to being able to order individual pieces.

http://www.mondellotwister.com/GasketsSealants.htm

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Old April 16th, 2018, 01:32 PM   #3  
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I wonder if your 260 starter is strong enough to spin the 455?
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Old April 16th, 2018, 03:45 PM   #4  
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I wonder if your 260 starter is strong enough to spin the 455?
Been there, done that. It will just go "click" and do nothing else so you will need to get a new starter. Just get one for a 76 Cutlass with a 455. You might need to find some new starter bolts as well, I can't remember for sure as it's been 25 years since I did the swap.
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Old April 16th, 2018, 04:51 PM   #5  
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Check out Joe Mondello racing. He has a nice 3 piece intake kit that worked wunders for my project. Easier install with runner seperate from the valley pan. If you do the rear main seal I would look at the timing chain and gears. Originals had the crappy plastic toothed gears.

Has entire engine gasket kits down to being able to order individual pieces.

http://www.mondellotwister.com/GasketsSealants.htm
You’ll regret buying anything from Lynn at Mondello.
Mr Gasket ultra seal sets are first rate, can comment on the other ones.
if you want a cheapie then use the Sealed power 260-1008 set.
and I would think a low compression 455 wouldn’t be any harder to kick over than anything else but.......
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Old April 16th, 2018, 05:18 PM   #6  
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The Mr Gasket sets are basically the old Corteco gaskets, which were good quality, with a neoprene rear main included for a 455. As said a timing set like the Cloyes billet roller and a cam from Cutlassefi will wake it up nicely. I would do Yukon spider gears, I exploded a set in my 88 Cutlass with a 403, the stock ones are soft.
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Old April 16th, 2018, 07:53 PM   #7  
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Please do your homework before buying from Lynn, he is not a recommended vendor by most on this site. It’s buyer beware with that guy
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Old April 16th, 2018, 08:09 PM   #8  
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I would think a low compression 455 wouldn’t be any harder to kick over than anything else but.......
I used the 260 starter on a 1975 350 and it worked for 3 years and I could tell it was straining a bit, but it never quit on me. When I put the 455 in the starter basically flipped me off and said "are you serious with this right now?!?!?!?".....click.
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Old April 16th, 2018, 09:23 PM   #9  
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The smaller 260/307 starter didn't cut it on my 403 when hot.
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Old April 17th, 2018, 04:08 AM   #10  
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following along,as i am planning on dropping my 455 in an 80 cutlass i recently aquired .
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Old April 19th, 2018, 02:56 PM   #11  
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My only experience with Mondello was buying his three piece intake kit where the runners are seperate from the valleypan and have extra mesh area around each runner and coolant run. Went through a Rock Auto rebuilder intake that just had a thicker mesh as well. When that was put on we went from a vac leak to a coolant leak on a few runners.. 1st atempt gasket was out of an overhaul gasket kit, which gave us the vac leak.
My problem came about when the machine shop decked the block and heads, and either correctly shave some of the intake faces off.

So being able to handle the runners separately made the big difference for us.
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