What year? If it's a 1g not that big a deal if it's the 4g63 n/t. If it is a 2g it's a totally different motor. Not worth trying to swap it IMO. If you MUST be boosted get a HRC kit for the 420a.
x2 what this guy said, it would cooler than trying to convert and not worth the money anyway if you have the money for HRC then tell me i can give you prices on any part homie