The Flash says: "If your motor can't breathe, you aren't going anywhere with your big-inch Caddy motor. It's a classic case of spend your money in all the right places . . . I consider head-rework to be almost essential to the building a performance Cadillac engine."
Premium Re-manufactured Stock Heads
$700 Specify 76cc, 120cc, or 425 heads. Shot-tumbled, magnafluxed, surfaced as needed, and assembled. No port work. Bronze guide-liners are installed, and seats are cut and hand lapped. Stock heads are assembled using stock size replacement valves (2.00” induction hardened intake/ 1.62” stainless exhaust), OE size performance valve springs (Stage I), Chromoly retainers, and hardened valve locks.
Super/Street Steel Heads
$1,395 Specify 76cc, 120cc, or 425 heads. Shot-tumbled, magnafluxed, surfaced, and assembled. Intake and exhaust ports are matched to our premium gaskets. Pushrod walls on the intake side are moved back. Ports are smoothed, blended, and polished (the last 1˝”). Bronze guide-liners are installed, and three angle seats are cut and hand lapped. Super/Street heads are assembled using oversize 21-4N stainless valves (2.19/1.90 for 76cc, 2.11/1.77 for 120cc and 425 heads), special spring shims, performance valve springs (single w/ damper), Chromoly retainers, and hardened valve locks. Valves are not “back cut” to ensure maximum longevity.
PRO/Street Steel Heads
$1,695 Specify 76cc, 120cc, or 425 heads. See ‘Super Street’ Heads above. With more port work and reworked combustion chambers.
PRO/Comp Heads
$2,195 76cc or 120cc Heads. As above, PRO/Comp cylinder heads also feature fully worked ports, radiused guides, your choice of 2.11/2.19 (street) or 2.25 (race) intake valves, spring cups, dual valve springs, lightweight Chromoly retainers, and hardened valve locks.
Cylinder Head Core Charges
Core charges vary, depending on the casting numbers. Cad Company does not pay inbound freight on cores in most cases. We do accept different casting numbers than the heads you are purchasing as cores, with the exception that we do not accept 425 head cores for 500 heads. You may ship your cores ahead of time to avoid paying the core charge in the first place, or you may ship them later for a refund of the core charge. The maximum core charge refund you will receive is the amount designated for the heads you are receiving. Cores returned more than 1 year after the initial purchase of the heads will be refunded 75% of the core charge due.
76cc Head Cores $295 250, 950, and 902 castings
120cc Head Cores $250 493 and 552 castings
425 Head Cores $150 423 castings
Aluminum Heads
At the time this is written, the aluminum heads have been on backorder for quite some time (several years). We expect the revised street heads as well as a new race style head to be available in the future. Pricing is yet to be determined, but we are expecting prices starting around $2695 assembled. Keep an eye on our website for more information.