I have been offered a 1992 460 out of a motorhome.
Imwondering if this engine is same as old 460,does intakes,cams etc..fit this engine?
Is it a good core to build hig performance on?
Yes, it's good to use for performance if you put '68-'71 429/460 heads on it with corresponding intake. Cams will swap between all 429/460s. It will also have the good truck rods too. Swap heads, intake, and cam and you'll have a strong runner.
Don't forget to replace the timing chain with a Cloyes or alternative aftermarket since the original timing chain set up for that year had a retarded cam timining, a multi index set will let you set it straight up adv or ret.
Also if these are the "D" port heads they are an extremely nice set of street heads. They offer good velocity & volume & can be ported fairly close to early flow numbers. It's also external balance so watch yout flexplate & damper. The timing cover also has no provision for a fuel pump.
Take it. You can build a strong performance 460 (or even larger) based on that motor. You don't need the early heads, in fact those are great and also are a better choice than the smaller cc heads of pre-1972, if you are going to rebuild the motor, you can get flat top pistons from KB and if you wish to stroke it you can get some dished pistons and be a healthy 9.5-1 in either case.