Best Kept Secret in the Big Block Mopar World

MOPARMAGA said
I've seen 2 #230 casting blocks 1 didn't have the huge main webbing and the 1 with the huge main webbing had a crack across #3 main saddle.
I have 3 #630 casting 73 400s, 1 is my 470, 1 has a cracked main saddle (mock up block) & the last 1 is in good shape but will need alot of detailing since it sat outside and will get 8 sleeves which I'm trying to track down a sleeve that will start slightly over the 4.342 standard bore.
I have a 383 Im going to experiment with also might see about getting 440 sleeves to fit, not sure if that's even possible but I'll find out
Click to expand...


Just remember the nominal ID of the sleeve is just that. Most sleeves come .030-.040 under nominal bore size so you have something to bore to size (for honing of course).

The bigger the ID you start with the thicker the sleeve will be when you are done. I used to have a chart with all the sleeve sizes on it. That went away when the dyno went away. But I would look for whatever bore size I wanted and the length and I would get that rather than looking up a sleeve in the catalog.