i have a 75 duster /6. i have another motor i am going to build and just do a swap so the car wont be down for a long time and was wondering weather it would be better to shave the block or head to raise compression?

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1975 Plymouth Duster,225/6 2bbl. and duels, 904, 7 1/4
1986 Dodge Charger Shelby, 2.2 Turbo I, A525

Shaving the head's easier, but shaving the block helps reduce negative deck height, which is generally a good thing.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Do yourself a favor and CC the heads when you get through with the milling. It will help to know what your actual compression ratio is when you are trying to get the spark plug heat range and tuning optimized.

just a thought

bwhitejr

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'72 Duster (Performance 360)
'83 Ramcharger (Performance 318)
'80 TrailDuster (360)
'80 D-150 Truck (See Below)
CompCams 252S, Holley 390cfm, Offy manifold
Ported, Polished and Gasket Matched
P4286813 Springs,0.040 Overbore,
0.090 Shaved Head

hi,because your doing a total rebuild, take .060 to .100 off deck (depending on how far down your pistons are) and then cc head to figure how much to take off head for final comp ratio. ron

If you take .080 to .075 from the head and have the block decked .010-.015 to make it a good sealing surface you should end up around 9.0-9.5ish with a .040 gasket.