Thick or thin front seal oil pan gasket?

[SUX2BU99]

I am going to have my leaky oil pan gasket fixed this week. I want the blue 1 piece Fel-pro oil pan gasket but they make a thin or a thick front seal type. The thin is driver-side dipstick only and the thick is either. I have a driver-side dipstick. How am I to know if I need a thin or a thick gasket? Thanks.

[eventhorizon66]

Not sure how to tell, but I can tell you it is dependent on the oil pan, not the timing cover.  This is the one I used on my Goodwrench engine: http://www.summitracing.com/parts/FEL-OS34510T/ (it is a thick front seal).  I got it at AutoZone for about $5 less than Summit's price after tax.

[SUX2BU99]

Oh, on the oil pan, eh? Interesting. The one that is on it appears to be a cheap, stamped chrome-plated Mr Gasket type of pan. I guess I could pick up both and my mechanical can figure it out from there, then return the one I don't need. Would be nice to avoid that hassle though. I know that when I bought the truck, the stock oil pan came with it (which I've since discarded) and this one started to leak a few months after. I suspect poor installation of the crappy typical multi-piece oil pan gasket that's on there.

[SUX2BU99]

I wish I could determine for sure, but I'm pretty sure it's either a Trans-dapt pan or Mr Gasket. Both brands are popular up here. It looks just like this TD one:
http://www.tdperformance.com/images_products/6036.jpg

It also looks like this one too:
http://www.mr-gasket.com/ProductDetails.aspx?MajID=725&MinID=7251&productID=275&txtSearch=oil%20pan

But of course neither site doesn't say zip about whether they take thick or thin seals. How does one know?

[SUX2BU99]

Anybody else have info about how to determine which gasket is needed? I'd like to buy it today. Thanks.

[eventhorizon66]

Just found this: http://www.chevytech.com/2c70o1.html

[SUX2BU99]

Heyyyyyy, that's awesome. Thanks man! Since my pan is aftermarket, I'll get the thick one.