434 SBC Build

[J Poissant]

Hello guys that know things about 400 stroker motors. I’m considering building a 434 Small block to replace the 425hp 360 sbc in my Camaro.
Goal is 520-550 hp and 6800-7000 capable.

HP for fun and the extra rpm to work well with my gearing on the typical autocross and longer tracks I run it on.

First questions:
I’ll be using a OE 400 block (have access to one that is virgin/ unbored). What clearancing is needed in the oil pan rail area for a 4” stroke? Special pan needed?