Mild 383 build
They're all pretty thick, I'm building a .070" over 383 as we speak and just finished most of the machine work. I was explaining some of the details on another web page which is what gave Shorty the idea to do one . I planned on making a short video with pics to explain the 72-78 440 piston 383 budget build, these pistons have the same CH as the 68-69 HP 383. My block after boring and honing checked about .180"ish to over .200" on all major and minor thrusts. The downfall is the flat top piston with no valve reliefs so you're limited to duration in the 240ish range at .050". I built many of them when I had my first machine shop in NH back in the 90s for customers that wanted a low budget build that would run high 11s to low 12s and used stock 72-78 440 pistons I had laying around from 440 builds. The pistons are about 30 grams heavier than the stock 383s so I cut the stock pins down to 3" which brings them from about 225 to about 191 grams, I"m not sure what the Silvolites weigh but They're probably close to the stock ones. I"ll put up some pics and tell more about it tomorrow. The block still has to be cleaned and new cam bearings installed and I'll hone the piston pin bosses for .0010" to .0012" clearance. I'm building this out of stuff I have laying around the shop to run on pump gas and put in my 62 Dart and run the local Friday night bracket which is 25 dollars and 10 miles away. The cost to take my race car out is getting out of hand.