iWARNING: Products on this page can expose you to a chemical, which is known to the St ate of California to cause cancer or reproductive harm. **For more information go to www.P65Warnings.ca.gov**23B1. CLARK CYLINDER BARRELS - NEW "FULL FIN"All 6 lbs. each STANDARD +20 +30 +40 +601961-6 4220 - - - - - - 220 C11624A 220 C11625A 220 C11626A 220 C11627A280 C11623 280 C11624 280 C11625 280 C11626 280 C116271965-69220 - - - - - - 220 C11629A 220 C11630A 220 C11631A 220 C11632A280 C11628 280 C11629 280 C11630 280 C11631 280 C11632220 FINISH is usually suggested for Cast Iron & Chrome Rings. +30 or larger need big bore head gaskets.280 FINISH is usually suggested for Moly, but is OK for Cast & Chrome.See Pg 23C for Cylinder / Piston / Ring Kits with "Full Fin" Cylinder Barrels. There is NO CORE for these items.2. BORED CYLINDERS - "PREMIUM"Precision bored and honed cylinders IN STOCK. We use only cylinders with perfect fins and gasket areas. All cylinders are inspected, cleaned, blast-ed, bored, honed, oiled, sealed in plastic bags and individually boxed. (We do allow cylinders missing less than 1/4 sq. inch of fins). Your exchange set can be sent in after you have pulled your engine down (or before if you want). Don't trust your cylinders to a "should be able to" Machine Shop. These are done on machines specifically equipped for this purpose. See page 23A for photos of our equipment. We offer cylinders with 220 and 280 finish. The 220 finish is suggested for CAST IRON and CHROME RINGS. The 280 finish is suggested for MOLY RINGS. (See page 24). All prices INCLUDE A REFUNDABLE CORE FOR EACH CYLINDER. 1961-63 CYLINDERS 220 FINISH 1964 CYLINDERS 220 FINISH 1965-69 CYLINDERS 220 FINISHNOTE!+30 and larger need big bore head gaskets (stock can hang over)+20 = C2858+20 6 lbs.+30 = C2858+30 6 lbs.+40 = C2858+40 6 lbs.+60 = C2858+60 6 lbs.+20 = C2858X+20 6 lbs.+30 = C2858X+30 6 lbs.+40 = C2858X+40 6 lbs.+60 = C2858X+60 6 lbs.+20 = C2854+20 6 lbs.+30 = C2855+30 6 lbs.+40 = C2856+40 6 lbs.+60 = C2857+60 6 lbs.1961-63 CYLINDERS 280 FINISH 1964 CYLINDERS 280 FINISH 1965-69 CYLINDERS 280 FINISH+20 = C7966 6 lbs.+30 = C7967 6 lbs.+40 = C7968 6 lbs.+60 = C7970 6 lbs.+20 = C7972 6 lbs.+30 = C7973 6 lbs.+40 = C7974 6 lbs.+60 = C7976 6 lbs.+20 = C7978 6 lbs.+30 = C7979 6 lbs.+40 = C7980 6 lbs.+60 = C7982 6 lbs.DEPOSIT ON CYLINDERS: You DO NOT get YOUR cylinders back. There is a CORE DEPOSIT INCLUDED in the price of each cylinder. The CORE VALUE is listed in the PRICE LIST after the part #. Full CORE VALUE per cylinder will be refunded when we receive (prepaid) identical, unbored, per fect gasket surface cylinders with no broken fins (will accept 1 fin broken to the size of a pea). You can also ship cylinders first with your order and subtract the CORE FEE.PACKING: Cylinders are shipped in individual boxes. Please return cores in these boxes. If you can't, then wrap cardboard around each cylinder. If you stack cylinders, separate by cardboard.GM PorosityActual Photo of Our CylinderCLARK CYLINDER BARRELS - NEW "FULL FIN"We contracted with a company that has made replacement VW & Porsche cylinders for years. They are producing new "FULL FIN" CYLINDERS for us that are fashioned after the 1960 "FULL FIN" Corvair cylinders (VW & Porsche cylinders also used this configuration).It is felt that the 1960 style cylinders had SEVERAL ADVANTAGES: A. The top fins going completely around the top of the cylinder help to reinforce and provide a more stable cylinder during operation. With less distortion (especially on larger bores) the cylinders will stay truer and create less piston friction and wear. B. The additional fins may add slightly more cooling.Clark Modification: We are making the cylinder walls about .030" thicker for even greater strength. This means that if the cylinder is bored .060, it will end up at the original wall thickness. While cutting GM cylinders in half we found they varied by up to .050 from side to side. It appears GM had trouble keeping the fin tooling centered on the bore. Our supplier is doing much better! Our castings are also very dense and consistent (see "GM Porosity" in photo at left).STOCK SIZE: These cylinders will be available in stock size for customers that want to go back to stock (STD) size pistons for 1961-64 and 65-69's. All cylinders will be 280 finish. All cylinders will have the clearance notch so 61-64 cylinders will all be "64 style". See below to order.OVERSIZES: We will also offer these new cylinders in +20, +30, +40, +60. See below. CORE? There will be NO CORE FEE, but we pay for good used cylinder cores delivered to us. We include a note with the new cylinders to tell you what we are currently paying for good used cylinders.In Cylinder/Piston Ring SETS? YES! (See page 23C for ordering)CHECK WITH US FIRST - Please!If you think something is wrong with a part, call or write before you send it back or modify it. 90% of the time customers think something is wrong - it isn't. Please check with us first. If you modify a part - it's yours![