Can anyone tell me what the piston to Deck clearance is for a 383 with the following parts.
The part that I'm not sure of is the Piston top to pin center distance. If I new that, I could calc it on my own. The block has never beened milled, it's the stock height.

3.75 in. stroke.
5.7 in. Rods.
Federal Mogul Speed-Pro 383 600hp pistons.
(the ones with the coating on the outside).
Block is a pre-1986 350 4 bolt.

Thanks,
SS4speed.

Do they look like these?

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33623&item=2438906589

Jim

ss, (name ??)
It looks like almost all of the Speed Pro forged 383 pistons for 5.7 rods have a compression hgt of 1.430 but.... I would not depend on measuring the parts to determine how much to deck your block. There are too many manufacturing variables involved. The only way to accurately measure it is to mock up the assembly and measure it in the block. You might be able to get away with it IF you have an accurate stroke checking fixture for the crankshaft, we have seen a lot of variations there.
Also, the factory block deck heights can vary as much as .030"
Just my opinion,

The ones I have are in the picture, exact match.
Thanks for the info, 77 and Bill, the replies here are great.
I guess it's more than past time, for me to join and start supporting this Web site.

Thanks,
Fred.

Like what was said above, it is near impossible to say without mocking it up and measuring. OEM blocks vary quite abit, but I just decked my 400 small block .032. Anxious to assemble to see if I botched it! smile.gif

So far is looks ok with eyeball.

smile.gif

You can take a piece of solder and hold it in the spark plug hole while someone turns the motor over. Then you will have a 100% dead nuts accurate quench when you take it out and measure the solder with micrometers!

When the piston squeezes the solder, does it rock in the bore? If so, yeah, you'd be pretty close, but not 100% accurate.