BigRobs HZ Sandman....

[Valencia]

600 Holley on a 253 will be to big Rob honestly Edelbrock performer manifold with a 450 Holley with a nice mild cam would be the go had this combo many years ago on a Kingswood van went quite well

[Vombil]

600 Holley on a 253 will be to big Rob honestly Edelbrock performer manifold with a 450 Holley with a nice mild cam would be the go had this combo many years ago on a Kingswood van went quite well

Frostman will vouch for the 450. 600 is too big for sure. quaddy off a 253 blue motor will look the part

[Frosty]

Frostman will vouch for the 450. 600 is too big for sure. quaddy off a 253 blue motor will look the part

465 four barrel. I had a 500 and 350 on it before. Not so good.