yeah swapping main caps was a dumb statement, but you get what i meant. i didnt know if the later just had 2 bolt mains in 4 bolt blocks which would be pretty dumb

from the looks of it it is a 4 bolt machined area just missing the second set of holes. wish i had a before and after of my block as far as the mains are concerned. and the engine builder sed aside from the caps i bought 4 bolt mains weakens the blocks ALOT. only thing it help with is cap walk. and if you just add studs it fixes that issue and is a stronger setup then any 4 bolt Besides the Bow Tie caps i have from the SB2.2.

NICE

Had a 400sbc 2 bolt main 509 casting in my 71 Full convertible Blazer that was just a beast! Setup right these things are nasty for being an iron block with no machining done. Slap a good set of heads, yeah the double humps can be pretty desirable for somebody doing a matching numbers car. I would say pull the heads and put em up for sale and grab another set to slap on there. Depending on what you want to put it in and what you want out of it power wise then obviously go from there. A good dual plane intake with a demon will go a long way.

whats the going rate for a set of double humps I got 2 sets we actually pulled one set off the LT1 in the vette because with the domed pistons the CR was too high...

Whatever scrap is right now. I wouldnt use double humps on anything

I would guess between $200 to $400 on EBay.

dang im sitting on some cash.