Need help picking the right parts for performance or crate engine

[impala20]

Hi I have a 1995 Caprice/Impala that I want to get to 400-500 HP or more naturally aspirated but I also want to put custom 22” wheels on so I don’t know how much power I want exactly for a summer driver with big wheels.

I bought the car for a decent price with a clean under body, solid body with minor dents & imperfection from Florida with a Impala SS Interior also all the Impala parts that are on this Caprice were from the previous owners wrecked Impala SS including supposedly an engine swap because the dash says 200,000 miles and the engine out of his Impala had 80,000 on it but who knows if he swapped it.

When driving it home it seemed to be under powered and the engine was missing so I heard it could be the Optispark, & tune up and was wondering what the best Optispark & rotor & cap was for the price & performance?

So far I’ve changed the rear end to the Impala SS disc brakes & had the body worked on a little.

So how do I find out if the engine has been changed is their a vin on it and if it hasn’t with 200,000 miles will it hold up with new heads, cam, etc for a summer street driver?

I was thinking of going with LT4 Heads, LT4 Head Bolts, LT4 Intake Manifold, GM Hot Cam Set with Roller Rockers, 58mm Throttle Body, 36p Injectors but I’m no mechanic and prices on this stuff is high and there are many companies out their like Patriot Performance that make their own stuff for cheaper.

So what’s a good quality setup for what I want to do and what exactly needs to be done besides the performance stuff if the car has high miles & better safe then sorry stuff?

If I opt to change the engine what’s a quality crate engine from a respected trustable company for a good price?

Please list specific parts for what I need because I’m a little over whelmed on what needs to be done from reading some other posts and I’m trying to get the mechanical stuff taken care of so I can finish the body to have it ready to go and any help would be great thanks.

[CamaroZGuy]

i have close to the same HP goals out of my car; first you probably wont get the power you want out of a LT4 top end, and if you are questionable about how many miles are on the car i would get it rebuilt if you don't have the $$$ for a Crate engine. im shooting for about 400RWHP and planing a 355ci, custom grind cam, and either AFR or Trick Flow heads.
but if you want a Crate hear are some links
http://www.golenengineservice.com/html/lt1_lt4.html
http://www.victoryracingengines.com/