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JRyan · 12-01-2013, 12:25 AM

Adger,

I just looked at one of those 993/487X heads today while arranging my storage. I think they're close to being interchangeable being they're both hard seat heads. GM must have thought so too as they interchanged molds for both as I've seen 993 in the VC area and 487X on the intake runner too. Some of the 993's also have a 493 on the bottom.

Also, I've had a pair of 993's with 152 cc runners. I'll bet the boys with the "Cheatin Bastards" would like those.

Jerry

12-01-2013, 12:25 AM	#10
JRyan Senior Member Join Date: Apr 2003 Location: Aberdeen SD Posts: 645 Likes: 30 Liked 112 Times in 31 Posts	Re: 487 vs. 487x heads Adger, I just looked at one of those 993/487X heads today while arranging my storage. I think they're close to being interchangeable being they're both hard seat heads. GM must have thought so too as they interchanged molds for both as I've seen 993 in the VC area and 487X on the intake runner too. Some of the 993's also have a 493 on the bottom. Also, I've had a pair of 993's with 152 cc runners. I'll bet the boys with the "Cheatin Bastards" would like those. Jerry