Megaseth wrote:the TRD engine is the "same" motor, kinda. its the same motor with about $10,000 worth of work. drop in a 4AGZE 20v, that'll be fun to drive.
you guys talk like these rare toyota engines come a dime a dozen and that they're simple drop ins. not the case for a 4agze. if you want a direct conversion, you'll need a ae86 levin clip from japan (supercharged of course). that costs $$$. the cheaper, yet harder route will be a more attainable fwd s/c clip or an mr2sc clip. the 2 last options will have you doing extra work because those engines are in a fwd configuration (buying new or custom fabbing header, intake mani, water piping, s/c hanger etc...)
stick with your stock redtop for now. it has plenty of power. if you're wanting to do a swap, i'd say a 20 valve would be your best option for cost to performance/ease of installation. just make sure you have the smog hookups

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you can pm me if you want more info about this or other swaps.