Gasket sets. Pre 1985 and later than 1985?

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Bronze Barracuda

Bronze Barracuda

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Does anyone know what may or may not be different between a gasket set for a 360 prior to 1985 and after 1985.
Reason being is I picked up a bunch of parts unopened for a 360. One of which was a gasket set. 1971-1985.
I am putting together a 1990 360 block with 1975 360 heads. Will I be missing anything that this gasket set doesn't come with?

Thanks everyone.
 
Should work perfect on a 90 engine and right up till 93 especially since you're using LA heads
 
Bronze Barracuda said:
Does anyone know what may or may not be different between a gasket set for a 360 prior to 1985 and after 1985.
Reason being is I picked up a bunch of parts unopened for a 360. One of which was a gasket set. 1971-1985.
I am putting together a 1990 360 block with 1975 360 heads. Will I be missing anything that this gasket set doesn't come with?

Thanks everyone.
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Could it be the gaskets are so old that the application on the box stopped the year they were produced?
 
OK hijacking my own post here. So the parts I was looking at buying were rods, pistons, bearings (except cam) rings and a gasket set. Because the parts were so old I took one rod and piston to my machine shop. after quite some time we determined that the pistons were no good for any decent compression. The pistons were TRW 2380P apparently a hard part number to find for the machine shop but after measuring, talking it over with a couple other guys at the machine shop and some cross referencing they figured the compression would be around 7.25. Not sure if a mistake was made in the calculations but he figured because my block is a 1990 the deck height was different than pre 1985 blocks. (But after I left I was wondering if he was thinking about magnum blocks?) Either way I passed on the parts as I am looking for 8.5-9.0 CR (figuring I can run up to 9.0 safely on 87 octane) We talked about zero decking the block, but then we most likely need to machine the intake to fit and then possibly change the pushrods too. Although I am thinking if the block is a roller and the heads are from 1974 the pushrods may need changing anyway. But to the matter at hand now when looking for pistons should I be looking for pistons for the years 85-92?
 
KB-107 hypereutectic flat top pistons with 1.675 compression height and 7cc valve reliefs. Yes, magnum blocks had a shorter deck height. A 360 LA would have a 9.60 deck height, late non magnum hydraulic roller block included.
Probably use a Fel-Pro 521 SD head gasket (.055 to .060 compressed thickness) to reach 9:1. Fel-Pro 521SD Fel-Pro Head Gaskets | Summit Racing
 
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Garrett Ellison said:
KB-107 hypereutectic flat top pistons with 1.675 compression height and 7cc valve reliefs. Yes, magnum blocks had a shoter deck height. A 360 LA would have a 9.60 deck height, late non magnum hydraulic roller block included.
Probably use a Fel-Pro 521 SD head gasket (.055 to .060 conpressed thickness) to reach 9:1. Fel-Pro 521SD Fel-Pro Head Gaskets | Summit Racing
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Curious. Wouldn't a shorter deck height yield more compression? Thanks for the other info on the pistons and gasket set. :thumbsup:
 
Yes, and You’re Welcome! think the magnum block deck height is listed as 9.58, IIRC… UEM states that theKB-107 may protrude out of the block. That’s good for a 10:1 plus 360 with magnum block with LA 340 or 360 heads and Mr. Gasket 4.14 x .037 Pro-Seal head gaskets. Above deck flat top pistons are how the ‘68-Mid’72 340 made close to 10:1 compression.
UEM Pistons
 
Why are you using early heads on a roller cam block? Are you using a roller cam? Roller cam heads have .660 inch pushrod holes, where as the early heads only have .500 inch pushrod holes. If you use a roller cam, your pushrods will bind in the pushrod holes. If you are using a flet tappet cam-you are good to go. I would sure take advantage of the roller block by using a roller cam, don't have to worry about the dreaded cam break-in.
 
lemondana said:
Why are you using early heads on a roller cam block? Are you using a roller cam? Roller cam heads have .660 inch pushrod holes, where as the early heads only have .500 inch pushrod holes. If you use a roller cam, your pushrods will bind in the pushrod holes. If you are using a flet tappet cam-you are good to go. I would sure take advantage of the roller block by using a roller cam, don't have to worry about the dreaded cam break-in.
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What! I've never heard of this! Yes I definitely want to use a roller cam! I had a really good set of heads from a 1975 truck. Damn. Can I drill the holes out a little to be able to accommodate the pushrods if I were to use a roller cam. I seriously never knew about this.
 
I think it's like Mike said. It probably wasn't 1986 yet.
 
Ask your machinist on enlarging the holes, I'm not sure if it's possible. I think aftermarket aluminum heads have oval pushrod holes.
Bronze Barracuda said:
What! I've never heard of this! Yes I definitely want to use a roller cam! I had a really good set of heads from a 1975 truck. Damn. Can I drill the holes out a little to be able to accommodate the pushrods if I were to use a roller cam. I seriously never knew about this.
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If you are running a roller cam you need to use #302 , #308 , #576 , magnum or trickflow heads . Any other head will require the pushrod tunnels to be enlarged.
 
dogbreath said:
If you are running a roller cam you need to use #302 , #308 , #576 , magnum or trickflow heads . Any other head will require the pushrod tunnels to be enlarged.
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Well I guess I gotta give the machine shop more money. :mad: I just ordered a new roller cam from Summit. I ordered one from Hughes but they only had two roller cam profiles in stock, and they both required high stall TC's.
So I got a roller Comp Cam from Summit.( COMP Cams 20-810-9) stupid expensive. $505 just for a cam! Why are rollers more than double a similar flat tappet!? Thanks for the extra bit of info. So I guess just ask the shop to drill them out to 0.660?
 
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