ProMaxx and IMM aluminum small block LA heads

Those ProMaxx heads are box stock off shore chink heads.
Ow if you had found the CNC ported versions, I have those and they work well.

Weigh your price options and decide from there.
IMM is a poster here every now and again and is known for top notch excellent work.
My ProMaxx heads work was very well done. The off shore chink heads are handled by them and finished up here in the USA.