The earlier ones were 180, later ones were 195. 195 is usually better, unless you're trying to crutch an undersized cooling system. Better off to repair/replace/upgrade as needed to run higher temps for better engine efficiency.
1983 Chevy 305 diagram, waterneck, thermostat housing and fittings
The bore and stroke is---3.740 bore and 3.480 stroke. STOCK 305
235 horse is stock on 98 305
about 60psi
The 305 HO was the highest power version.
connected to thermostat housing
yes
305
Need to know the year.
About 280 horses.
3.740 x 3.480 / inches. Stock factory bore.
Yes you can no problem.