Need a little guidance from the gurus

I don't get why everyone is anti big block
Chassis and brakes should be upgraded on any high powered engine.

Magnums make a great platform especially in the 300-400 hp range above that on the street larger cid is probably a good idea but even at lower power levels 440 would make the same power about 1000 RPMs lower and need about one full gear ratio lower eg ... 360/4.10:1 vs 440/3.23:1.

A decent street cam intake and headers gets about 1.2:1 torque per cid and most engines make about 90% torque at peak Horsepower so pick peak power at 5252 rpm since it's a good street engine peak and mathematically simple since torque and hp are the same at the rpm.

440 x 1.2 x 90% = 475hp @ 5252 rpm
360 x 1.2 x 90% = 388 hp @ 5252 rpm
440 would make the same power as the 360 about 4300 RPMs.

And peak torque would be about 1500 RPMs lower
528 lbs-ft and 432 lbs-ft @ 3750 rpm respectively
3.23:1 x 528 = 1705 to the tires
4.10:1 x 432 = 1771 to the tires

As you can see for cheap streetable hp there's no replacement for displacement and both those power levels are just carb/intake cam and header swap away.
Edit...Actually the 440 would need head work and CR to get there but ya know what I mean.

Intake and headers will lower the weight quite a bit for those who's worried about such things.