Well I was looking to put them on at 350 that is in my 64. I am just looking for a little boost in power nothing crazy just trying to find a good streatable combination. The heads I am currently running I feel are holding me back a bit they are a set of 882 with 1.94 1.5 valves and 76 cc chambers, flat top pistons, and an XE274H cam specs are .490 lift intake and exhaust, 230 and 236 duration at .050 and 110 LSA. With the heads that are on it the compression ratio is about 8.9:1, and using a cr calculator with the 60 cc chambers it would be about 10.5:1. The bump in compression would be nice, but the only thing I am worried about is the flow of the powerpack heads, if I do put 1.94 valves, would they get shrouded? I would love to use the heads because I only have $125 in them, and they are fresh heads just got rebuilt.
Thanks for the help
Willy
Install 1.94 intakes,1.5 exhaust valves,a little bowl clean up.replace guides if needed,you've got a very peppy 327-350 up to about 5000 rpm.Brian';s right, A set of L-30[305=1.84 in,1.5 ex.,58 cc's ] on a 283 based engine is good for 20 hp [minimum] over the modifyed power pack.s.L31[350] heads 1.94,1.5-63-6 4 cc's,larger ,better designed ports[30 hp.minimun ov er the power pack head] In my experiance,the L31 head is by far the be st bang for the buck in terms of torque and power probuction.As Derry asked,what are you trying to get the engine to do,and what size engine are you using them on?
