351 XE on LPG
Join Date: Jul 2003
Location: Perth, Western Australia
Re: 302 heads 4 351 on gas
Dont presume the dissy has been done.
Full mechanical advance should be in no later then 2800-3000 rpm.
I used 30 thou flat top ACL Duralites, (which also come with pre-fitted and pre-sized rings), nice and easy for me since it was my first V8 build. From memory they cost me about $250. That was back in March 2001.
QUOTE FROM ACL ONLINE CATALOGUE
ACL Duratech® pistons are designed to provide enhanced performance characteristics compared to the OEM pistons they replace. These pistons are all solid skirt design which provides up to 30% greater strength than pistons which have a sawn or cast oil return slot in or below the oil ring groove. Oil drain back is via cast slots below the oil ring. High silicon material: ACL Duratech® pistons are made from a high silicon aluminium alloy which is the same as used in most high performance original equipment pistons around the world. This alloy combines excellent scuff and wear properties with maximum strength and minimum expansion.
Benefits . . .
• Stronger than the original equipment pistons they replace.
• Lighter than the original equipment pistons they replace hence less mechanical losses and maximum power and less vibration.
• Highly wear and scuff resistant in extreme situations due to high silicon alloy.
• Able to operate quietly and reliably at low clearance due to low expansion coefficient of the high silicon material and also due to sophisticated computer generated 3 dimensional diamond turned skirt profiles.
Hope this helps. There may be better value pistons around. If you are planning on using NOS, then I'd use Hypers instead.