j_eremy Posted April 15, 2007 Share Posted April 15, 2007 Ok here is my problem, about a month ago I purchased a 355 which was running, the guy I bought the engine from conned me. he said the engine was too much for his son- long story. anyways the engine was in thecar, and it sounded great. once I got the engine home and did a compression check, posted the #'s grumpy said it was in the 12-1 range. it had a set of 305 ho heads on it, shaved .040 head #416. further inspection of the block shows scoring of the # 4 cylinder wall. so now I need to rebuild. here is where I need help. I am planning on purchasing a set of summit .060 over -5cc flat top pistons. the cam I am planning on running is this cam:erson cam. E113421 Street and Strip. High-lift, dual pattern. Rough idle. Good mid and top-range horsepower. Needs 4-barrel intake, headers and lower gears. OK with automatic and 3,000 RPM stall speed torque converter. 9:1 compression or more.2,800- 296° IN 228° IN .472" IN 110° 4° .000" IN 6,200 TQ50H 306° EX 235° EX .472" EX .000" EX I returned the tri y I purchased from edl and purchased eld rpm air gap, I dont have the money for the heads I want, put a machine shop has another pair of 305 heads for 250, fresh valve job. if I put this engine together like this , with the crappy 305 heads will it run decent untill I can get the set of heads I want. this has turned into more of a headache then I planned. thanks for the help. Quote Link to comment Share on other sites More sharing options...
lbhsbZ Posted April 15, 2007 Share Posted April 15, 2007 IIRC, the 305 heads have some pretty small valves. I don't see much point in using those on anything but a 305. I see you're in SD. If you ever come up to LA, I've got a decent set of 76cc 350 heads that I'll trade you for a 6 pack. I think even a stock 350 head with 194 valves would work better than a 305 head. Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted April 16, 2007 Share Posted April 16, 2007 its the total combo that gets results and the cylinder heads are critical to the final numbers(power) but IM ONLY TOO well aware of how budgets restrict choices. those 305 heads will NEVER produce good hp simply because they don,t flow enought air. and they have a small combustion chamber that raises cpr and tends to be a problem with detonation. IM some what confused here, if you have 305 heads why purchase a new(used rebuilt set of 305 heads) the .040 milled surface is just not going to be a huge factor here,IF YOUR STAYING WITH 305 HEADS ,personally ID look around for a decent set of 350 compatable heads, AND NOT EVEN THINK OF USEING THE 305 heads http://www.midwestmotorsportsinc.com/order_part.php?item=PHEAD&line=MWM http://www.midwestmotorsportsinc.com/order_part.php?item=PPHEAD&line=MWM Quote Link to comment Share on other sites More sharing options...
steal my nametag Posted April 20, 2007 Share Posted April 20, 2007 350 heads are not hard to find, and even the stock heads are better than 305 heads. the work it would take to get those 305s flowin' right you could just buy a set of aluminum 350 heads. it's really not worth it man, sorry you got scammed but cut your losses... Quote Link to comment Share on other sites More sharing options...
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