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Discussion Starter · #1 ·
Hello,does anybody knows how large the dish+valvreliefs is
on 289 2v piston and how far down the hole they are?
Another question:Can I put a MSD 6AL to my distributor.it is
a MALLORY MBI #4255111?

Have a nice day. Gresse in cold Sweden
 

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Gresse,
Is this a stock 289 piston? If so the dish and reliefs are around 12cc.
Not sure how deep in the hole...if you are trying to calculate compression ratio I would estimate the pistons are 0.015" below deck.
 

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Discussion Starter · #4 ·
Perfekt.Thank you very much.
Btw the tip I got on my one wheel tractionloc(adjust the brakes loose on
one side)worked awsome.Thank you guys for that.
Any ideas on the Mallory-Msd configuration?
 

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Just so you know, 289 and 302 pistons are the same thing. Find a 302 piston with the specs you want, and buy it.

The only difference between a 289 and 302 is 1/8" of stroke. This was made up for with the use of shorter rods in the 302. Pistons are both 4.00" bore and have the same pin height.

Good Luck!
 
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