Lashes given for doin' too much in one go,... but your adjustments don't sound too unreasonable...
1. Is your new muffler intact?... or has it been debaffled?...
2. What's your elevation?... a 152# may be a bit large. What pilot did you put in?...
3. Why do you think TDC might be off?... did you adjust valves?...
We need this info...
We will help...
...and welcome to SS.com.
Don't panic... we got this..
Yer' really doing very well... just a little hitch we need to figure out...
Give us the details,.. and smarter guys than me, will get right on it...

We have mechanical psychics on staff,... but I don't trust them.