You did a pretty involved mechanical project and got it all back together and running again... and you did some pretty smart things like the Hi-temp RTV at the base... and "gasketmaker' on the head instead of a gasket... and probably got more compression... and thats why its climbing better.
Pretty good for a 14 year old.
The increased compression makes for more low-end... but it probably won't change the top end at all.
Run it hard and do a plug chop to make sure it is not running too hot.
Always do that after making changes.
For anybody considering using the RTV or gasket maker... use very little and spread it out smoothly.