340 valiant build advice needed.
Yeah we did try to tune the timing and carburetor yesterday
To what?
The factory specs are not going to be that helpful because the engine is modified and we don't know a lot about it. The more we can learn about it the easier it will be to suggest a baseline. Performance tuning is a process different than doing a factory tune up on a factory setup.
I'd start with a notebook. part of it can be a log book.
For timing, need a tachometer, a timing light and timing tape or a dialback timing light.
Measure timing from idle rpm to as high as you feel comfortable. Write down the rpm and timing (with vac advance disconnected and the vac line plugged). Then we can talk.
A compression test is a good idea too.
LOL. None of us have X-ray vision. At minimum remove the air cleaner so we can see the carb and intake.
I see headers. If the heads are later 360 heads, there are air ports under the exhaust port that have to be plugged.
We can also make suggestions that may prevent some non-engine failures down road.