Quote Originally Posted by David88vert
I've done a lot of research over the years on RX7's (all years), 13B's (all types) , and LS1's (and LT1s). My father was mechanic and built a lot of race cars (both street and track) over the years, so it was natural for me to stay with the V8s. I like V8s a lot, but for the cost, I'll stick with the 13B-REW in a FD. For the cost of converting to a LS1, I could convert to a 20B and make even more power.

Another thing to consider. Most of the 350 swaps don't run better than 12's - 13's. Plan on changing gearing, mounts, etc, if you go the LS1 route.
You could do the 20b, but why? It won't make any more hp than an LS1 is capable of, most parts have to be custom made, as do some of the tools to work on them, the motor is very heavy compared to the LS1 (and thus affects handling), the motors still only last 70k miles and get shitty gas mileage.
Most LS1 swaps run mid-low 12's and good drivers can bring them into the 11's. It's gonna cost me a total of I can get LS1 crate motors for around $1000 a peice and trannys for $500. The total cost of mounting equipment comes to about $1000, so you're telling me you could do a 20b swap for $2500(mind you this is an fc, less mounting equip needed), most 20b swaps I've seen run about $10-13k and that's leaving the motor stock.

My picture is in a street car also, it runs on pump gas, has full interior and is expected to run in the 8s on radials but last time they were at the track, the rear-end locked on them .