Park G10 Turns On, but No Sound

[indianmike]

l own a park g10r amp i came across in early 1990. most of pots were either frozen or scratchie. sprayed all inside wiper arear and also at the shaft male female seams. still scratchy but got more movement when using wd40 lithium grease spray on shaft seams. still scratchie. will change em all out for same value audio where i can slowly dial in sounds iam looking for.but will continue to upgrade the amp in which i love the clean sound i love. the reverb has been a on and off project over the years swapped out cheap belton reverb tank for a 17 1/2 hammond acoutronics sounded great but too large for cabinet in which i knew but was curious. So i spoke to a engineer @ acoutronics and gave em the belton tank numbers and told em was looking for a better sustain and more larger sound. they sent me a med decay 9 1/4 tank was better but still was set on finding real spashy wet dripping surf reverb. so i went with a modkits with a long decay 8BB3C1B and never looked back. it sounds like a fender princeton or a fender stand alone reverb unit. i know i could have bought another amp bla bla bla. but i love this amp cause of its tone and cause its portable.  now i want some input advise as how to install a effects loop and line output. please help.
what are the best chip mods i can use for the jrc4558dd 8 pin ic i have four of them would  TL02 ic be best for all of the 4558DDs to make it less hiss and quiet and bright. what about the power transistor with the heat sink. please open to suggestions thank you Indian Mike

swapped out the 4558 ics for texas instrument TL072 type very well controled far less hiss iam very please all pots were replaced with audio type just got in a 2.2k audio. I dont know if its the mod tank but reverb seems a little smaller sounding even at full up. the eq seems to be working ok. any change due from swapping from linear to audio on some of the pots. what i mean should some of them be linear than all audio maybe in the eq section. any and all suggestions considered.  On this how can i enhance the tone maybe different caps vintage type if so would bring out more hiss white noise ect. please let me know. thanks mike.

(park g10r amp)swapped out the 4558 ics for texas instrument TL072 type very well controled far less hiss iam very please all pots were replaced with audio type just got in a 2.2k audio. I dont know if its the mod tank but reverb seems a little smaller sounding even at full up. the eq seems to be working ok. any change due from swapping from linear to audio on some of the pots. what i mean should some of them be linear than all audio maybe in the eq section. any and all suggestions considered.  On this how can i enhance the tone maybe different caps vintage type if so would it bring out more hiss white noise ect. please let me know. thanks mike.