Get a 13b-re engine. Basically the same as a 3rd gen rx7 engine but different intake manifolds. They can be had for $1500 with a transmission, but then it will need another $2,000 into it to make it very very nice. Go to Rx7club.com , register as a member and start searching and asking questions. They is always atleast 120people online at that forum at every moment of the day.