i guess you could do it with a sbc and just add a few extras on it.poss change the cc with shorter con rods i belive its called a stocker kit, real steel do the kit.ive never built one to 500hp so i cant say for sure.
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Cars don't get old, they get a v8. Its not how it looks,it's how YOU see it that counts.
No the only V8's are Range Rover using a variation of the old buick v8 which they have used for 30 years. BMW and Mercedes etc. I am not sure but I dont think any of them are over 6.6.
There are probably some small independant car builders building an exotic car with a v8 but I am not sure...I dont really like modern cars that much so dont keep up with the latest models!!
Oh I just realised, cherokee etc come with a v8 if you want but most people have the diesel.
i personly go big block, a good base motor to start with. then i would give jc whitney a call for a stroker or rebuild kit, a mid range cam with intake to match, port and match the intake and heads and a good old holly on the top and headers and see what happens.
thats what im thinkin.you allready got most of just havin a big block.it costs a lot of $$$ to get 500 hp out of a small block.i'm sure tango could build a 500 hp small block pretty dang cheep, but thats tango.most folks cant do it without alot of $$$
depending on aplication of the motor i.e street or strip would determin the best motor to use !! either can be built to 500 hp on a reasonable small budget..