Try Search .
But .312 intake , down to .285 for a sub 60 ounce 56 or 58 in plane . the .312 is the Patternmaster size . big thick wing 70- + ounce ship. Unless your Jesus Christ & build it a 60 ounce .
so likely .290 / 295 /.300 ish bore .
The 12 x 6 three blade masters fine , but not light .
A 12 x 6 Zinger or Master - Wood . Best thinned / shaved . to 13 x 5 7 14 X 5 trimmed to 12 3/4 . Cording to Urtnowski .
If youve got a big uugly timber prop , put a few flights on so you can decide wether to loose or gain some pitch , before reworking it .
Whadayagot fora muffler ?
can you do a picture . Theres maybe four distinct series of v 60. or more . The Double Star muffler bolts on the ' No ear ' case- with a custom strap .
5 thou. ring gap , a smidge less . Maybe .
https://rmjmachineworx.com/ or pommy ones on Ebay . Randy ( Aero Products ) has new S Tigre N O S ones at $ 20 .
If the gaps past 8 thou. youll benefit replacing it .
Gudgeon / wrist Pins are a Pia . Polish on 1200 Wt. on glass . a wire through it . Dont ping it off into oblivion holding it with pliers/ forceps .
Theres ST 46 ' maintanace ' drivle , on SEARCH here ( a few pages back on this ' Open forum ' ). But DONT modify it !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Just Clean imaculately . Heat with heatgun to fit new bearings . A Seal on the front of the Front Brg. C3 spec for clearance .
Maybe one extra gasket on head .
Look at ' Engine Set Up ' page . And read fixed pposts at THE TOP .
http://www.clamf.aerosports.net.au/newsletters/ACLN/Issue39.pdfAt Your Peril . Early series head , is ' full ' hemi. Narrow squishband . Like 1 m.m. .